JPS6017831B2 - Composition and cleaning method for cleaning metal surfaces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the cleaning of metal surfaces, particularly tinned ferrous metal surfaces, and to the corrosion resistance of metal surfaces and the subsequent application of organic sanitary lacquers (hereinafter referred to as “
The term "hygienic lacquer" is used to designate lacquers that have no harmful effects on the human body.

Examples of such lacquers include: to prevent food or drink from contacting and corroding the metal surfaces of the can;
There are solvent-based vinyl resins or water-based epoxy resins that are coated on the inside surface of the can. ), relating to preparing metals for subsequent processing to enhance adhesion, such as dry finishing. Containers used in the food industry can be made from tinned ferrous metal.

These containers are usually “rolled and ironed”.
It is manufactured by a method called ``wngandimning''. That is, a sheet of tin-plated iron metal is stretched and systematically thinned to create a stretched sheet with uniform wall thickness and to produce thin-walled, multi-layer containers. Since tin plating is expensive, a thin layer of tin plating is used. During manufacturing and forming of tin-plated ferrous metal containers, lubricants are used to facilitate rolling and ironing operations. Lubricants applied to metal surfaces typically include various types of mineral oils, vegetable oils, emulsifiers, and corrosion inhibitors. Recently, new and improved lubricant compositions have been developed and used in tin-plated drill rolling and ironing operations.

These new compositions form highly removable, thick lubricant layers on metal surfaces. It is known that if the lubricant layer is not completely removed from the metal surface during the cleaning operation, the metal surface becomes dewetted and becomes unsuitable for subsequent treatment to enhance corrosion resistance or to provide a decorative appearance. There is.

It is also known that when such new and improved lubricants are used in stretching and ironing operations, the cleaning fluids used become ineffective and/or difficult to handle due to the build-up of these lubricants.

The accumulation of these lubricants in the cleaning fluid causes saponification of the lubricating oil, resulting in increased foaming. Attempts to improve the cleaning fluid's ability to remove these new and improved lubricants by increasing the alkalinity of the cleaning fluid or by increasing its temperature end up resulting in excessive etching of the metal surface.

A serious problem with rolled and ironed tin-plated containers in general is that the rolling operation pulls on the internal tin-plated surface, creating pores and increasing the size of the pores, exposing the underlying iron surface. That's true. To clean the surface and remove the lubricant from the surface, a cleaner (Cleaner) is used which not only removes the lubricant but also etches the tinned iron surface. This etching further exacerbates the problem of corrosion of exposed steel surfaces through the holes, leaving unsightly rust spots. Moreover, when processing containers during production after the rolling and ironing steps and the cleaning step, processing line conditions such as line termination can cause corrosion of the exposed iron surfaces, rendering the containers unfit for use. There is sex. Corrosion and stains formed on the surface are removed by convection, which is subsequently applied.
n) Adversely affecting the adhesion of coatings or sanitary lacquer coatings. The industry uses various cleaning compositions to treat surfaces to remove lubricants and forming oils on tinned ferrous metal surfaces.

Cleaning compositions that simultaneously etch the surface and remove lubricant are unsuitable because they promote corrosion of the surface. Moreover, while cleaning compositions known in the art do not provide protection for tin-plated surfaces after the cleaning process and before subsequent treatments such as compaction coatings or sanitary lacquer coatings, they still acceptably suppress foaming. While the new and improved lubricant is removed. Cleaning fluids used to remove lubricants and oils from metal surfaces are generally weakly to strongly alkaline.

Examples of cleaning fluids known in the art include U.S. Pat. No. 3,888,783.

These aqueous cleaning solutions contain condensed phosphates, alkali metal metasilicates, and shelf sand and are used to clean tinned ferrous metal surfaces. These cleaning solutions are described in the patent as being effective in cleaning tinned iron surfaces without etching the surface. US Patent No. 3
No. 145,178 and U.S. Pat. No. 3,145,180 disclose sulfonated and unsulfonated tertiary carbon amines (car
Cleaning compositions are described having alkali metal hydroxides, phosphates, silicates and carbonates together with at least one of each of the following: boMmjne).

Although the above-mentioned known cleaners are suitable for many purposes, they do not provide a completely water-break-free surface, cause excessive etching or foaming, or Known to be defective for one or more reasons such as inability to provide a suitable surface for subsequent treatment to enhance corrosion resistance or for the adhesion of subsequently applied organic sanitary lacquers or dry finishes. There is. Moreover, many of the known cleaning compositions contain, for example, trellis sand, which is known to be ecologically undesirable. The present invention provides cleaning compositions, cleaning fluids, and cleaning methods for removing lubricants used in molding operations from metal surfaces without etching the surface and without excessive foaming.

Use of the present invention also prevents corrosion of exposed areas of ferrous metal over extended periods of time before subsequent treatments such as compaction coatings or organic or sanitary lacquer finishes.

The main object of the present invention is to provide a composition for cleaning metal surfaces, especially tin-plated ferrous metal surfaces, in order to provide a clean surface suitable for subsequent finishing treatments such as compaction coatings and dry finish coatings. , a cleaning solution and method.

One particular object of the present invention is to provide a cleaning fluid for effectively removing lubricant from rolled and ironed tin-plated ferrous metal containers without surface etching and without excessive foaming. It is to be.

Another object of the invention is to provide a cleaning fluid that can be used to render metal surfaces water-free.

Another object of the invention is to clean metal surfaces, especially rolled and ironed tinned iron metal surfaces, to render them suitable for further treatment by compaction coating or passivation treatments. .

Another object of the invention is to provide a clean metal surface suitable for compaction cornering or passivation to enhance subsequent sanitary lacquer adhesion.

Another object of the invention is to clean metal surfaces, especially rolled and textured tinned iron surfaces, so that subsequently applied paints, inks, lacquers or sanitary lacquers become adhesive to the surface. .

Another object of the present invention is to use a cleaning fluid in accordance with the above objectives which also minimizes or eliminates foaming in the cleaning fluid.

The present inventors believe that the above purposes are based on alkali metal metasilicates,
Achieved by using a cleaning composition, an aqueous cleaning solution and a cleaning method comprising an alkali metal condensed phosphate, an alkali metal carbonate and optionally an alkali metal bicarbonate to produce an aqueous solution of at least 10% I discovered that it is possible.

The cleaning compositions of the present invention, when added to water, produce an aqueous cleaning solution which, when applied to metal surfaces, particularly tin-plated metal surfaces, and more particularly to rolled and ironed tin-plated ferrous metal containers, Removes lubricants used in molding operations, does not etch, produces clean, water-free metal surfaces with minimal superbubbles, and compaction coats or passivates metal surfaces. Making the surface suitable for treatment and subsequent treatment by adhesive application of paints, inks, lacquers or sanitary lacquers. As used herein, the term "ferrous metal" is to be understood to include iron, iron alloys and various steels.

The term "tin-plated metal surface" means a metal surface having a metal coating layer consisting essentially of tin.

The metallization layer may be a continuous layer or a discontinuous layer with exposed base metal. As used herein, the term "lubricant" refers to deposits formed on metal surfaces during forming operations, particularly during rolling and ironing, and includes various types of animal oils, mineral oils, vegetable oils, emulsifiers and Contains corrosion inhibitor. As used herein, the term "cleaning composition" refers to a dry mixture of an alkali metal metasilicate, an alkali metal condensed phosphate, an alkali metal carbonate, and optionally an alkali metal bicarbonate and a surfactant. are suitable for use in the method of the invention when dissolved and diluted in water.

As used herein, the term "cleaning liquid" refers to an aqueous solution formed by adding a dry cleaning composition to water, including alkali metal metasilicates, alkali metal condensed phosphates, alkali metal carbonates and optionally consisting of an alkali metal bicarbonate and a surfactant, said aqueous solution having p
H is at least 10 and suitable for use in the cleaning method of the present invention.

The alkali metal metasilicate used is preferably selected from the group consisting of sodium metasilicate and potassium metasilicate.

The addition of alkali metal metasilicates to the cleaning fluid not only increases the cleanliness of the cleaning fluid to more effectively remove lubricants, but also provides additional protection against surface corrosion prior to compartment coating. . Silicates are also excellent saponifiers of lubricants and residual loosening and dust on metal surfaces. Typical examples of alkali metal metasilicates that can be used are sodium metasilicate and potassium metasilicate.

In the preferred practice of the invention, anhydrous sodium metasilicate should be used in the cleaning composition for the production of aqueous cleaning solutions. Sodium metasilicate is easily soluble in water and provides high alkalinity and good cleaning properties. Preferably, the alkali metal condensed phosphate used is selected from the group consisting of tripolyphosphates and pyrophosphates. Preferred alkali metal condensed phosphates are sodium tripolyphosphate and sodium pyrophosphate. In a preferred practice sodium tripolyphosphate should be used. Alkali metal condensed phosphates are valuable for their water softening, detergency and emulsifying properties. Alkali metal condensed phosphates are alkaline when added to water, thereby facilitating the production of alkaline aqueous cleaning solutions. The alkali metal carbonates and alkali metal hydrogen carbonates used are preferably sodium carbonate and sodium hydrogen carbonate. Alkali metal carbonates, bicarbonates and mixtures thereof are effective in adjusting the alkalinity of the cleaning solution to a pH of at least 10. When dissolved in water, alkali metal carbonates and alkali metal bicarbonates hydrolyze to form alkaline solutions. Adjustment of the alkalinity of the cleaning liquid is obtained more flexibly by using alkali metal carbonates and alkali metal bicarbonates at lower cost than, for example, alkali metal hydroxides. Moreover, when alkali metal carbonates and bicarbonates are dissolved in water, alkali metal enteric ions are obtained for saponifying lubricating oils. [
a' about 0.1 to about 1.5 parts by weight of an alkali metal condensed phosphate; 'b} about 0.3 to about 2.5 parts by weight of an alkali metal carbonate; and about 0.0 to about 1.5 parts by weight; parts by weight of alkali metal bicarbonate.

Preferred cleaning compositions of the invention have a weight ratio of 1:(0.2
0-0.70):(0.45-1.70):(0.20
~0.55) of alkali metal metasilicates, alkali metal condensed phosphates, alkali metal carbonates and alkali metal hydrogen carbonates.

As mentioned above, the alkali metal cation of all compounds used in cleaning compositions and cleaning solutions is preferably sodium or potassium, most preferably a sodium alkali metal enteric ion.

When preparing the cleaning solution, {a) an alkali metal metasilicate of about 0.5 to about 13.0;
Evening/evening, 'b' alkali metal condensed phosphate approx. 0.05~
Approximately 20 evenings/so,'c Alkali metal carbonate approximately 0.15
and 'd) an alkali metal bicarbonate in an amount sufficient to form a cleaning solution having a pH of at least 10, comprising from about 0.0 to about 20 m/s; The composition must be added to water.

Preferably, the cleaning fluid comprises 'a} from about 0.5 to about 13 alkali metal metasilicate; {b) from about 0.1 to about 1 alkali metal condensed phosphate;
0.0 t/t'c} alkali metal carbonate from about 0.2 to about 22 t/t; and (d} from about 0.1 to about 7.1 t/t from alkali metal bicarbonate.

The cleaning solution preferably contains from about 2 to about 30 times per day of the cleaning composition, more preferably from about 2.5 to about 20 times per day of the cleaning composition.

In a preferred embodiment of the invention, the metasilicate portion of the cleaning composition comprises sodium metasilicate and the condensed phosphate portion of the cleaning composition comprises sodium tripolyphosphate, as described above.

Substantially equivalent cleaning compositions and cleaning fluids can be produced using pyrophosphate in place of tripolyphosphate. In this case, the concentration of pyrophosphate present in the cleaning liquid must correspond to the concentration specified above when tripolyphosphate is used. The above concentration parameters were calculated based on sodium metasilicate and sodium tripolyphosphate. As mentioned above,
In a preferred embodiment of the invention, sodium salts are chosen for use, but other alkaline salts such as potassium salts can also be used in place of sodium salts. It is desirable to add surfactants (both high-foaming and low-foaming), antifoaming agents, and mixtures thereof to the cleaning compositions of the present invention.

These materials enhance detergent performance and/or minimize foaming. Typical examples of surfactants and lubricants that can be used in the cleaning fluids of this invention are ethoxylated linear alcohols and octyl or nonylphenoxy polyethoxyethanol. Preferably, nonionic surfactants should be used in the cleaning solution. Preferably,
It is highly desirable to use at least one nonionic or low foaming surfactant that has been modified to have low foaming properties. Preferably, a total amount of from about 0.05 to about 0.5 parts of nonionic surfactant is present for each part by weight of alkali metal metasilicate present in the cleaning compositions or cleaning fluids of the present invention.

Typical examples of cleaning compositions that have been subjected to dilution with water to create optimal performance cleaning solutions having component concentrations and operating parameters within the ranges set forth herein are as follows.

Formulation 1 Formulation 2 Formulation 3 Formulation 4 Formulation 5 Formulation 6 Formulation 7 Formulation 8 Triton N-100 (Rohm & Haas Corp. trade name for Triton N-10 and nonylphenoxypolyethoxyethanol) Onyx Deformer #4 (OH Matsu D-Kan Foamer #4) is manufactured by Onyx Chemical Co., Ltd. (OnyxC) for surfactants based on sulfonated oils.
chemical Co. ), and ``tergitolmine form 1-X'' is a trade name of Union Carbide Co., Ltd. (Union Carbide Co., Ltd.) for modified linear alcohol ethoxylates.
CarideCorp. ) product name.

Other surfactants (designated by trade name) that can be used in the cleaning compositions of the present invention with equal or improved efficacy are Makon NF-12, Sumonjc LF-17. , Neodol 25-7 (Neodl, 25-7) and Neodol 25-9, Min-Foa 21
m2-X), Vetrowolf F-100-Kai (Petro
ulf F-100-mark), Alwet B (Nkaw
et B), Triton X-102, Anti-Baffle Agent D
) and the compound tributyl phosphate. The cleaning fluid of the present invention can be applied to a substrate using contacting techniques known in the art. Preferably it is applied by conventional fogging or soaking methods. The treatment time of the tinned ferrous metal surface with the cleaning solution need only be long enough to ensure complete wetting of the surface, which may be as long as 20 minutes. Preferably, the surface should be treated between about 19 sands and about 6 sands. The cleaning fluid of the present invention can be used at temperatures as high as about 90°C (1940F). The cleaning method of the present invention uses approximately 570 (13y)
F) to about 80 qo (1760 F). Within this temperature range, cleaning action is enhanced and superfoam is minimized. In any event, a temperature of at least about 54 qo (1300 F) should be used. This is because, at temperatures lower than this temperature, superbubbles may be excessively generated, especially when the fogging method is used. The cleaning fluid of the present invention should be highly alkaline and have a pH of at least about 10.

Preferably the cleaning solution solution should be maintained at a level within the range of about 11 to about 12.5. Alkali metal carbonates and alkali metal bicarbonates and mixtures thereof are used to adjust the cleaning liquid to the appropriate pH. During cleaning operations, a loss of components occurs due to factors such as adsorption and action of components in the cleaning fluid on lubricating oils and loose dust.

For example, silicates are consumed during saponification and cleaning actions.
A simple titration can be used to determine both the composition and the need to add replenishing composition. For example, either each component is added separately to the appropriate cleaning solution at the time required, or a replenishing composition having the same component ratios as present in the prepared cleaning composition is added. to maintain cleanliness within prescribed operating parameters. The cleaning method of the present invention can be carried out by treating the tin-plated metal surface after the rolling and ironing steps.

Generally, surfaces do not require any pretreatment prior to contacting with the cleaning fluid of the present invention. However, to extend the life of the cleaning fluid, it is desirable to have a pre-cleaning step to remove excess lubricant. Additionally, it has been found that adding a small amount of the cleaning composition of the present invention to the pre-cleaning solution helps remove excess lubricant from the metal surface prior to contact with the cleaning solution. In this manner, overflow and waste of cleaning fluid during cleaning operations is minimized. Thus, in general, the cleaning method of the present invention is carried out either immediately after the molding operation, or after a short period of time after the molding operation, or immediately after the pre-cleaning step, or after a short period of time after the pre-cleaning step. be exposed. As previously mentioned, although the cleaning fluid of the present invention can be used to remove many types of lubricants, it is particularly effective in removing mineral oil-based lubricants used in rolling and ironing tin-plated metal, which are difficult to remove. It is particularly advantageous to

It is known that some of these mineral oil based lubricants are particularly difficult to remove with prior art cleaning fluids. After application of the cleaning fluid of the invention, the surface becomes a completely water-free surface.

A water-free surface is one that is completely free of lubricants, dirt, and other contaminants, creating a continuous film of water on the surface. After the cleaning operation, the metal surface is usually washed with water.

Water washing is necessary to remove any cleaning agent residue from the metal surface that may remain after the cleaning process. After the cleaning step, the metal surface can be contacted with a coating solution to deposit a corrosion-resistant coating layer. This corrosion-resistant coating layer also serves to enhance the adhesion of subsequently applied organic, sanitary lacquers, dry finishes, etc. For example, a coating solution with the following formulation can be applied to a surface to provide "excellent corrosion resistance and sanitary lacquer adhesion.wt% monosodium phosphate 0.65-0.8
51 Disodium phosphate 0.65-0.
85 Acidic hydroxylammonium sulfate 0.07~0
．． 05 Ammonium hydrogen fluoride 0.03~
0.05 water 97.03~98
．． 06 After the cleaning process according to the invention, the clean, water-free surface has a highly photosensitive appearance;
Corrosion resistance and adhesion of subsequently applied sanitary lacquers etc. are improved.

Lubricants that are difficult to remove include, for example, Prosol 174 and 522 (Mobil Oil Corp.), Solvac (S
olvac) 800, Quakerol (Q female kerol)
539 [QuakerChem
icalCorp. )], Technalube (TechM1
u is) 174 [Technolup Products Co., Ltd. (Techn
oLuGProducne, Inc. )], and Texaco (Te Field Co.) 591 [Texaco,
IM. )].

The cleaning fluids of the present invention are surprisingly free of such lubricant removal difficulties, withstand higher concentrations of such lubricants than prior art cleaning fluids (thus requiring less replenishment and draining), and are free from excessive foaming and etching. None.

An advantage of the present invention is that after the cleaning process is completed, the tinned ferrous metal surface will not experience any corrosion if exposed to air for an extended period of time prior to application of the compaction coating.

Examples of the present invention are shown below, but these examples are for illustrating the present invention and should not be considered as limiting the present invention.

Example 1 Rolled and ironed tin plated steel canned crabs were brought into sand-to-grid contact with an aqueous cleaning solution containing cleaning composition formulation 4 at various concentrations in a production line at various temperatures.

The pH of the cleaning solution was always 11-12.

Various concentrations of Quakerol 539 oil were added to the cleaning solution in addition to the Quakerol 539 oil that was present from the molding operation.

The following observations were made for each experiment.

The slight etching seen in Run 4 was caused by the cleaning temperature being higher than necessary for the particular cleaning composition used.

Prior art detergents, such as those exemplified in U.S. Pat. Bubbles formed.

This example demonstrates that the cleaning fluid of the present invention can withstand high concentrations of lubricants in cleaning fluids, without the difficulty of removing tin oil-based lubricants, without etching, and with minimal foaming. It shows.

Example 2 Rolled and ironed tin-plated steel keys were contacted with an aqueous cleaning solution containing Cleaning Composition Formulation 4 in a pilot plant for various times at a temperature of 1600F.

The pH of the cleaning solution was always 11-12.

Various concentrations of Quakerol 539 were added to the cleaning solution in addition to the Quakerol 539 oil that was present from the molding operation.

The following observations were made in each experiment.

22.47/The same test as above was carried out using an aqueous cleaning solution containing the cleaning composition formulation 4.

The following observations were made for each experiment.

This example demonstrates that the cleaning fluid of the present invention can withstand increased lubricant in the cleaning fluid, without the difficulty of removing key oil-based lubricants, without etching, and with minimal foaming. It shows.

Example 3 In this example, a tin-plated, rolled and ironed steel container was used.

A cleaning solution was prepared by adding 15 parts of the composition of formula 4 to 1 part water and stirring to completely dissolve the ingredients. The pH of the cleaning solution was 11-12. The obtained cleaning solution was
Contact with the container was made by misting for 60 seconds at 1600F.

After the treatment, the containers were washed with cold water and visually observed for etching, gloss, and tin removal. The test containers had a bright, rust-free appearance and no tin loss or etching. During the cleaning process, the metal surface was observed to be unbroken by water. Example 4 Tin-plated steel containers were treated with various cleaning solutions in the same manner as in Example 1.

A base batch cleaning solution was prepared by adding a cleaning composition having the following composition to water every 15 minutes.

Weight% sodium metasilicate (anhydrous) 22
．． 9 Sodium tripophosphate (vertical) 9.
5 Sodium hydrogen carbonate 55.6
Onyx Defoamer (0 Nakamatsu Defoamer) #
4 0.5 The pH of this cleaning solution is 10.
0, and this cleaning solution is referred to as comparative cleaning solution A.

To a portion of the cleaning solution was added enough sodium hydroxide to react with half of the sodium bicarbonate to form sodium carbonate and raise the pH to 10.7.

The obtained cleaning liquid is the cleaning liquid of the present invention, and is referred to as the cleaning liquid B of the present invention. Inventive cleaning solution B contains approximately 27.8% sodium bicarbonate and 27.8% sodium carbonate. To another portion of Comparative Cleaning Solution A was added enough sodium hydroxide to convert all of the sodium bicarbonate present in the cleaning solution to sodium carbonate. P
H'ma was 12.2. This cleaning liquid is the cleaning liquid of the present invention, and is referred to as the cleaning liquid C of the present invention. Cleaning liquid C of the present invention
contains about 55.6% sodium carbonate. Cleaning liquid A, B
, C, a prior art cleaning solution with silicate, tripolyphosphate, nonionic surfactant, and shelf sand was prepared. This prior art cleaning composition is described in US Pat. No. 783 and has the following formulation:
Weight% Sodium metasilicate (anhydrous, beads) 60 Sodium tripolyphosphate (anhydrous, powder) 14 Shelf sand pentahydrate 21 Triton N
-100 55PH=1
1.9 This prior art cleaning composition was added to water at 10 pm/evening star to make Prior Art Cleaning Solution D.

Cleaning solutions A, B, C, and D were heated to 71°C (1600°C).
F) At 6 capes, the sand was brought into contact with a tin-plated steel container by misting.

This container had a removed mineral oil based lubricant, residual lubricant Quakerol 539, remaining on the surface from the rolling and ironing operations. After contacting the containers with the respective cleaning liquids, the foaming effect of the cleaning liquids was observed, and the containers were observed for water-break, detining, and etching. The results are shown in Table 1.

As can be seen from the results in Table 1 above, prior art cleaning solution D resulted in unacceptable etching.

Example 5 Rolled and ironed steel wire was mixed with an aqueous cleaning solution having phosphate, carbonate, bicarbonate and silicate components and to which various surfactants were added at 71°C for 6 hours. Made enemies with Machi Suna.

The basic cleaning composition formulation to which a surfactant was added was as follows.

Weight % Sodium Tripolyphosphate 10.0 Sodium Carbonate 48.8 Sodium Bicarbonate 12.2 Sodium Metasilicate 288 [Metso Anhydrous 2048 Beads] This cleaning composition was added to water in an amount of 13.5 minutes/day. was added to create a base cleaning solution.

One or more surfactants were then added to this base cleaning solution.

Occasionally, Quakerol 5, a lubricant for stretching and ironing
39 was added to the cleaning solution.

The addition of lubricant to each cleaning fluid was in the form of a 10% 0/W emulsion. Additions were made in 50' increments. 6
By adding 10% ○/W emulsion to the Z rating (used here), the lubricant content in the cleaning liquid was reduced to 0. Hitoshi Gi/
increased.

After bringing the surface of the bonito into contact with the cleaning solution, the cleanliness of the surface was evaluated.

A completely clean, unbroken surface of water was given a rating of 2.

A grade of 0 was given if the surface was hardly wet. Numbers and fractions between 0 and 2 indicate the unbroken surface of the water.

By adding these numbers together, you can achieve ``total cleanliness special grade''
is obtained. A total cleanliness rating of 0 is a nearly wet surface, and a total cleanliness rating of 8 is a completely clean, unbroken surface. After treating a large number of moths, the sample moths were evaluated and the foaming properties of the solutions were observed.

The results of these tests are shown in Table 2. Table 2 Example 6 Rolled and ironed tin-plated moths were prepared into an aqueous cleaner having lithate, carbonate, bicarbonate and silicate components, to which various surfactants were added. liquid and 7
6. Inter-corrosion with sand was carried out at 1°C.

The basic cleaning composition formulation to which a surfactant was added was as follows. Weight % Sodium Tripolyphosphate 10.1 Sodium Carbonate 23.3 Sodium Bicarbonate 23.3 Sodium Metasilicate 43.3 (Metone Anhydrous 2048 Beads) 433 Add this cleaning composition to water in an amount of 135/ml to make a base cleaner. I made a liquid.

One or more surfactants were then added to this base cleaning solution.

Occasionally, Quakerol 5, a lubricant for stretching and ironing
39 was added to the cleaning solution.

The addition of lubricant to each cleaning fluid was in the form of a 10% O/W emulsion. The addition was carried out every 50 times. With the addition of 10% ○/W emulsion to the 6-segment (used here), the lubricant content in the cleaning liquid is 0.833/W.
It increased.

After bringing the whisker surface into contact with the cleaning solution for 6 minutes, the cleaning solution on the surface was evaluated.

A completely clean, unbroken surface of water was given a rating of 2.

A rating of 0 was given if the surface was hardly wet. 0 and 2
The numbers and fractions in between indicate the amount of unbroken surface of water.

Adding these numbers together yields the "total cleanliness rating." A total cleanliness rating of 0 is a nearly wet surface, and a total cleanliness rating of 8 is a completely clean, unbroken surface. After treating a large number of towers, the sample keys were evaluated and the foaming properties of the cleaning solution were observed.

The results of these tests are shown in Table 3. Table 3

Claims (1)

[Scope of Claims] 1. A cleaning composition that produces an aqueous cleaning solution for cleaning metal surfaces when added to water, wherein the cleaning composition comprises (a)
an alkali metal metasilicate, (b) an alkali metal condensed phosphate, (c) an alkali metal carbonate, and (d) an alkali metal bicarbonate, with an alkali metal condensed phosphate per part by weight of the alkali metal metasilicate salt is 0.1 to 1.5 parts by weight,
A composition for cleaning metal surfaces, comprising 0.3 to 2.5 parts by weight of an alkali metal carbonate and 0.0 to 1.5 parts by weight of an alkali metal hydrogen carbonate. 2. The cleaning composition according to claim 1, wherein the alkali metal condensed phosphate is selected from the group consisting of alkali metal tripolyphosphates and alkali metal pyrophosphates. 3. The cleaning composition according to claim 1, wherein the alkali metal condensed phosphate is sodium tripolyphosphate. 4. The cleaning composition according to claim 1, wherein the alkali metal carbonate is sodium carbonate. 5. The cleaning composition according to claim 1, wherein the alkali metal hydrogen carbonate is sodium hydrogen carbonate. 6. The cleaning composition according to claim 1, wherein the alkali metal metasilicate is sodium metasilicate. 7. The cleaning composition according to claim 1, wherein the alkali metal cation is sodium or calicum. 8. The cleaning composition according to claim 1, wherein the alkali metal cation is sodium. 9. A patent claim in which the alkali metal metasilicate is sodium metasilicate, the alkali metal condensed phosphate is sodium tripolyphosphate, the alkali metal carbonate is sodium carbonate, and the alkali metal hydrogen carbonate is sodium hydrogen carbonate. The cleaning composition according to item 1. 10 0.20 to 0.20 to 0.1 parts by weight of alkali metal condensed phosphate per 1 part by weight of alkali metal metasilicate in the cleaning composition.
70 parts by weight, and the alkali metal carbonate is 0.45 to 1
．． 70 parts by weight, and the alkali metal hydrogen carbonate is 0.2
The cleaning composition according to claim 1, which contains 0 to 0.55 parts by weight. 11 Also includes nonionic surfactants,
A cleaning composition according to claim 1. 12. The cleaning composition according to claim 1, wherein a total amount of 0.05 to 0.5 parts by weight of nonionic surfactant is present for every part by weight of alkali metal metasilicate present in the cleaning composition. Composition. 13. The cleaning composition of claim 1, wherein the nonionic surfactant is at least one low-foaming surfactant. 14 (a) an alkali metal metasilicate in an amount of from 0.5 g/l to 13 g/l, (b) from 0.05 g/l to 20 g
alkali metal condensed phosphate in an amount of /l, (c) 0.1
alkali metal carbonate in an amount of 5 g/l to 33 g/l, (d
) A cleaning composition according to claim 1 in the form of an aqueous cleaning liquid containing an alkali metal bicarbonate in an amount of 0.0 g/l to 20 g/l. 15 The amount of alkali metal metasilicate is 0.5 g/l ~
13 g/l, and the amount of alkali metal condensed phosphate is 0.
．． 1 g/l to 10.0 g/l, the amount of alkali metal carbonate is 1.5 g/l to 4.5 g/l, and the amount of alkali metal hydrogen carbonate is 0.2 g/l to 22 g/l. 15. The cleaning composition according to claim 14, which is 16. The cleaning composition of claim 14, having a pH of at least 10. 17. The cleaning composition according to claim 14, which has a pH of 11 to 12.5. 18. The cleaning composition according to claim 14, which also contains a nonionic surfactant. 19. The cleaning composition of claim 18, wherein the nonionic surfactant is at least one low-foaming surfactant. 20 Claim 14, wherein the alkali metal metasilicate is sodium metasilicate, the alkali metal carbonate is a mixture of sodium carbonate and sodium bicarbonate, and the alkali metal condensed phosphate is sodium tripolyphosphate. The cleaning composition described in . 21 In a method of cleaning a metal surface for removing lubricant from the metal surface, the surface is treated with (a) 0.5 g/l to 13
alkali metal metasilicate in an amount of g/l, (b) 0.
alkali metal condensed phosphates in an amount of 0.05 g/l to 20 g/l; (c) alkali metal carbonates in an amount of 0.15 g/l to 33 g/l; (d) alkali metal carbonates in an amount of 0.0 g/l to 20 g/l. A method of cleaning comprising contacting a cleaning liquid containing an amount of an alkali metal bicarbonate and thereby removing lubricant from a metal surface. 22. The method of claim 21, wherein the metal surface is a tin-plated ferrous metal surface. 23. The method of claim 21, wherein the metal surface is a rolled and ironed tin-plated ferrous metal surface. 24. The method of claim 21, wherein the alkali metal metasilicate is sodium metasilicate. 25. The method according to claim 21, wherein the alkali metal condensed phosphate is sodium tripolyphosphate. 26. The method of claim 21, wherein the alkali metal carbonate and alkali metal bicarbonate are sodium carbonate and sodium bicarbonate, respectively. 27. The method of claim 21, wherein the metal surface is contacted with the cleaning liquid by spraying. 28. The method of claim 27, wherein the spraying of the surface is continued for a sufficient period of time to ensure complete wetting of the surface. 29. The method of claim 27, wherein the surface is sprayed for a period not exceeding 20 minutes. 30. The method of claim 27, wherein the surface is sprayed for 15 to 60 seconds. 31. The method of claim 21, operating at a temperature not exceeding 90°C. 32. The method of claim 21, operating at a temperature of 57°C to 80°C. 33. The method of claim 21, wherein the cleaning liquid also includes a nonionic surfactant. 34. The method of claim 33, wherein the nonionic surfactant is at least one low foaming surfactant. 35 In a method for treating a tin-plated iron metal surface, (a)
surface at a pH of 11 to 12.5 and 0.5 g/l to 1
alkali metal metasilicate in an amount of 3.0 g/l, 0.1
alkali metal condensed phosphates present in an amount of from 0.2 g/l to 22 g/l and alkali metal condensed phosphates present in an amount of from 0.2 g/l to 22 g/l and from 1.0 g/l to 7.1 g/l. l
cleaning the surface by contacting it with an aqueous cleaning solution containing an alkali metal bicarbonate present in an amount of (
b) washing the surface with water; (c) coating the washed surface with a coating solution consisting essentially of monosodium monophosphate, disodium monophosphate, acidic hydroxylammonium sulfate, ammonium hydrogen fluoride, and water. , (d) washing the surface with water;
and (e) applying a sanitary lacquer to the surface. 36 A patent claim in which the alkali metal metasilicate is sodium metasilicate, the alkali metal condensed phosphate is sodium tripolyphosphate, the alkali metal carbonate is sodium carbonate, and the alkali metal hydrogen carbonate is sodium hydrogen carbonate. The method according to item 35.