CN117626280A

CN117626280A - Aluminum alloy cleaning agent and preparation method and application thereof

Info

Publication number: CN117626280A
Application number: CN202311736000.3A
Authority: CN
Inventors: 钟家倩; 顾文良; 陈俊杰; 吴洋
Original assignee: Shanghai Enkun Industrial Technology Co ltd
Current assignee: Shanghai Enkun Industrial Technology Co ltd
Priority date: 2023-12-15
Filing date: 2023-12-15
Publication date: 2024-03-01

Abstract

The invention relates to an aluminum alloy cleaning agent, a preparation method and application thereof, wherein the aluminum alloy cleaning agent comprises the following components in percentage by weight: 0.1-0.5% of chelating agent, 4-8% of surfactant, 6-12% of cleaning auxiliary agent, 5-10% of monoacid, 3-5% of solubilizer and the balance of water; the advantage is that fatty acid methyl ester ethoxylates and C9-11 ethoxylated alcohols are utilized with different surfactants: the coconut alkyl quaternary amine ethoxylate mixture is compounded and used, and has the functions of wetting, emulsifying, degreasing and the like, so that the grease on the surface of the aluminum alloy is thoroughly cleaned, and the cleaning agent disclosed by the invention is free of an aluminum corrosion inhibitor, a strong alkali auxiliary agent, phosphorus and silicon, is environment-friendly, free of corrosion and residue on the aluminum alloy, free of influence on the performance of the aluminum alloy, reduced in harm to human bodies and in waste water treatment pressure, and has important value in the application of cleaning grease on the surface of the aluminum alloy and prolonging the service life of the aluminum alloy cleaning agent.

Description

Aluminum alloy cleaning agent and preparation method and application thereof

Technical Field

The invention relates to the technical field of cleaning agents, in particular to an aluminum alloy cleaning agent and a preparation method and application thereof.

Background

The aluminum alloy is an important material widely applied to the fields of aerospace, automobile manufacturing, electronic equipment and the like, but the aluminum alloy has lower hardness, and the hardness, wear resistance and corrosion resistance are generally improved in the modes of electroplating, anodic oxidation, phosphating, spraying and the like in subsequent processing. The surface of the aluminum alloy is stained with various greasy dirt during the processing and forming process, so that the aluminum alloy needs to be cleaned before post-treatment to remove the greasy dirt, oxide film and other impurities on the surface.

The earliest cleaning mode is to clean greasy dirt by using an organic solvent, but the organic solvent has the problems of inflammability and harm to human bodies and environment; the purpose of cleaning is achieved by saponification of the strong alkaline solution, but the alkaline solution has very little effect of cleaning mineral grease, has strong irritation to human epidermis, and has great corrosion to aluminum alloy. Therefore, a cleaning agent which mainly achieves the aim of cleaning through the combination of a cleaning auxiliary agent and a surfactant appears in the prior art.

Because of the active characteristic of the amphoteric metal of the aluminum alloy, the aluminum alloy can react with strong acid and strong alkali, and is usually cleaned by adopting a cleaning agent with weaker alkalinity, and the alkaline auxiliary agent used in the prior art has certain corrosiveness to aluminum, so that a certain aluminum corrosion inhibitor needs to be added when a formula is prepared. The aluminum alloy corrosion inhibitor commonly used at present is usually silicon-type and phosphate-type corrosion inhibitors, and because the surface of the aluminum alloy is provided with a large number of micropores and holes, the silicon-containing aluminum corrosion inhibitor is easy to remain on the surface of the aluminum alloy because of the adsorption of the holes, thereby influencing the subsequent performance improvement processing of the aluminum alloy; on the other hand, adding phosphorus and silicon into the cleaning agent increases the pressure of wastewater treatment, and adding strong alkali can cause harm to human bodies; the cleaning effect of a single surfactant is not ideal, and meanwhile, some surfactants are not easy to dissolve in a water-based formula, so that the production efficiency of the cleaning agent is affected.

Aiming at the problems that in the related technology, strong alkali auxiliary agents are added into the cleaning agent to damage human epidermis, corrosion inhibitors are added into the cleaning agent to influence aluminum alloy performance, phosphorus and silicon in the cleaning agent can damage the environment, the wastewater treatment pressure is increased, the cleaning of a single surfactant is not thorough, and the production efficiency of the cleaning agent is influenced due to the fact that the surfactant is not easy to dissolve, no effective solution is proposed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an aluminum alloy cleaning agent and a preparation method and application thereof, and aims to solve the problems that the addition of strong alkali auxiliary agent to the cleaning agent in the related art causes harm to human epidermis, corrosion inhibitor is added to the cleaning agent to influence aluminum alloy performance, phosphorus and silicon contained in the cleaning agent can cause harm to environment, the waste water treatment pressure is increased, the cleaning of a single surfactant is not thorough, and the production efficiency of the cleaning agent is not easily dissolved.

In order to achieve the above purpose, the invention adopts the following technical scheme:

in a first aspect, an aluminum alloy cleaning agent is provided, which comprises the following components in percentage by weight:

0.1-0.5% of chelating agent;

4-8% of a surfactant;

cleaning auxiliary agent, 6-12%;

monoacids, 5-10%;

3-5% of solubilizer;

water, balance.

In some embodiments, the chelating agent comprises one or more of disodium edetate, tetrasodium edetate, hydroxyethylidene diphosphonic acid, ethylenediamine tetramethylene phosphonic acid, sodium gluconate.

In some embodiments, the surfactant comprises one or more of a nonionic surfactant, an anionic surfactant, a cationic surfactant, a nonionic/cationic amphoteric surfactant, wherein the nonionic surfactant comprises a fatty acid methyl ester ethoxylate, a fatty alcohol EO-PO block polyether, an isomeric tridentate polyoxyethylene ether, a rosin modified derivative; anionic surfactants include sodium dodecyl benzene sulfonate; cationic surfactants include polyquaternium; amphoteric surfactants include C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixtures.

In some of these embodiments, the components of the surfactant are nonionic surfactants and amphoteric surfactants.

In some embodiments, the weight ratio of the nonionic surfactant to the amphoteric surfactant is from 3 to 5:1.

in some embodiments, the weight ratio of the nonionic surfactant to the amphoteric surfactant is 3:1.

in some of these embodiments, the nonionic surfactant comprises a fatty acid methyl ester ethoxylate.

In some of these embodiments, the amphoteric surfactant includes a C9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixtures.

In some embodiments, the cleaning aid comprises any two of sodium gluconate, sodium hydroxide, potassium carbonate, potassium hydroxide, triethanolamine, monoethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, dihydroxyethyl cyclohexylamine.

In some embodiments, the cleaning aid comprises sodium gluconate and dihydroxyethyl cyclohexylamine.

In some embodiments, the weight ratio of sodium gluconate to dihydroxyethyl cyclohexylamine is from 1 to 3:1.

in some of these embodiments, the weight ratio of sodium gluconate to dihydroxyethyl cyclohexylamine is 2:1.

in some embodiments, the monobasic acid comprises one or more of gluconic acid, citric acid, boric acid, sulfamic acid.

In some embodiments, the monoacid is boric acid.

In some embodiments, the solubilizing agent comprises one or more of caprylic acid, isononanoic acid, neodecanoic acid, potassium polyetherphosphate, monosodium N- (2-hydroxyethyl) -N- (2-ethylhexyl) - β -alanine.

In some of these embodiments, the solubilizing agent is N- (2-hydroxyethyl) -N- (2-ethylhexyl) - β -alanine monosodium salt.

In a second aspect, there is provided a method for preparing an aluminum alloy cleaning agent according to the first aspect, comprising:

s1: heating half of the water to 20-70 ℃ according to the formula amount;

s2: adding chelating agent, and stirring uniformly;

s3: adding part of surfactant, stirring to dissolve completely, and stirring for 5-10min to ensure uniformity of the solution;

s4: supplementing the balance of water;

s5: sequentially adding the rest surfactant, the cleaning auxiliary agent, the monoacid and the solubilizer according to a formula, stirring for 5-10min after adding one component to ensure that the solution is uniform, and obtaining transparent solution, namely the cleaning agent;

in the above steps, the stirring speed of stirring is controlled to be 1000-1500r/min.

In some embodiments, the method of making comprises:

s1: heating half of the water to 20-70 ℃ according to the formula amount;

s2: adding chelating agent, and stirring uniformly;

s3: adding nonionic surfactant, stirring to dissolve completely, and stirring for 5-10min to ensure uniformity of the solution;

s4: supplementing the balance of water;

s5: sequentially adding an amphoteric surfactant, a cleaning auxiliary agent, monoacid and a solubilizer according to a formula, stirring for 5-10min after adding one component to ensure that the solution is uniform, and obtaining a transparent solution, namely the cleaning agent;

In some embodiments, the method of making comprises:

s1: heating half of the water to 50-60 ℃ according to the formula amount;

s2: adding disodium ethylenediamine tetraacetate and stirring uniformly;

s3: adding fatty acid methyl ester ethoxylate, stirring to dissolve completely, and stirring for 5-10min to ensure uniformity of the solution;

s4: supplementing the balance of water;

s5: c9-11 ethoxylated alcohol is added in turn according to the formula: coconut alkyl quaternary amine ethoxylate mixture, sodium gluconate, dihydroxyethyl cyclohexylamine, boric acid, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt, stirring for 5-10min after each component is added to ensure that the solution is uniform, and obtaining transparent solution, namely the cleaning agent;

In a third aspect, there is provided an aluminum alloy cleaning agent according to the first aspect or an aluminum alloy cleaning agent prepared by the preparation method according to the second aspect, wherein the application is selected from at least one of the following applications: the application of the cleaning agent in cleaning oil stains on the solid surface of the aluminum alloy and the application in improving the cleaning life of the cleaning agent.

Compared with the prior art, the invention has the following technical effects:

according to the aluminum alloy cleaning agent, the aluminum corrosion inhibitor is not added, phosphorus and silicon are not contained in the cleaning agent, the cleaning agent is environment-friendly, corrosion and residue are not generated on aluminum alloy, the risk that the aluminum alloy is corroded after the aluminum alloy is used due to the failure of the aluminum corrosion inhibitor after long-time storage is avoided, and the problems that the performance of the aluminum alloy is influenced, the phosphorus and the silicon of the cleaning agent are harmful to the environment and the waste water treatment pressure is increased due to the addition of the corrosion inhibitor are solved; the cleaning agent disclosed by the invention is free from adding strong alkali auxiliary agent, has low pH, is less harmful to human bodies in contact during the cleaning process, is safer, and solves the problem that the cleaning agent is harmful to the human bodies; the compound use of different surfactants FMEE and 226SA gives consideration to the effects of wetting, emulsifying, degreasing and the like, greatly improves the cleaning effect and the service life of the cleaning liquid, and accelerates the dissolution of fatty acid methyl ester ethoxylate (FMEE) by adopting water heating treatment, solves the problem that the surfactants are not easy to dissolve when the cleaning agent is produced, and greatly improves the production efficiency of the cleaning agent.

Drawings

FIG. 1 is the results of the dyne pen test of comparative example 4 and example 7 according to the embodiment of the present invention;

FIG. 2 is the results of the corrosiveness test of comparative example 7 and example 7 according to the embodiment of the present invention;

FIG. 3 is the results of the oil dissolution test of comparative example 10 and example 7 according to the examples of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. The experimental materials not shown in the examples below are all commercially available. The equipment used in each step in the following examples is conventional equipment. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer. Unless otherwise indicated, all parts are parts by weight and all percentages are percentages by mass. Unless defined or otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, any method and material similar or equivalent to those described may be used in the methods of the present invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.

Example 1

This example relates to an aluminum alloy cleaning agent of the present invention.

The aluminum alloy cleaning agent comprises, by weight, 0.1-0.5% of a chelating agent, 4-8% of a surfactant, 8-12% of a cleaning auxiliary agent, 5-10% of monoacid, 3-5% of a solubilizer, and the balance of water.

Preferably, the chelating agent comprises one or more of disodium ethylenediamine tetraacetate (EDTA.2Na), tetrasodium ethylenediamine tetraacetate (EDTA.4Na), hydroxyethylidene diphosphonic acid (HEDP), ethylenediamine tetramethylene phosphonic acid (EDTMPA) and sodium gluconate.

Preferably, the surfactant comprises one or more of nonionic surfactant, anionic surfactant, cationic surfactant and nonionic/cationic amphoteric surfactant, wherein the nonionic surfactant comprises fatty acid methyl ester ethoxylate (FMEE), fatty alcohol EO-PO block polyether (LF 305), isomeric tridecanol polyoxyethylene ether (TO-8) and rosin modified derivative (MSC); anionic surfactants include sodium dodecyl benzene sulfonate (LAS); cationic surfactants include polyquaternium (WT); amphoteric surfactants include C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA).

Further, the components of the surfactant are nonionic surfactant and amphoteric surfactant.

Further, the weight ratio of the nonionic surfactant to the amphoteric surfactant is 3-5:1.

further, the weight ratio of the nonionic surfactant to the amphoteric surfactant is 3:1.

further, the nonionic surfactant includes fatty acid methyl ester ethoxylates.

Further, the amphoteric surfactant includes a C9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixtures.

Further, the cleaning auxiliary agent comprises any two of sodium gluconate, sodium hydroxide, potassium carbonate, potassium hydroxide, triethanolamine, monoethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol and dihydroxyethyl cyclohexylamine.

Further, the cleaning aid comprises sodium gluconate and dihydroxyethyl cyclohexylamine.

Further, the weight ratio of the sodium gluconate to the dihydroxyethyl cyclohexylamine is 1-3:1.

further, the weight ratio of the sodium gluconate to the dihydroxyethyl cyclohexylamine is 2:1.

further, the monoacid comprises one or more of gluconic acid, citric acid, boric acid and sulfamic acid.

Further, the monobasic acid is boric acid.

Further, the solubilizer comprises one or more of caprylic acid, isononanoic acid, neodecanoic acid, phosphoric acid polyether ester potassium salt and N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt.

Further, the solubilizing agent is N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt.

In the related art, the traditional aluminum alloy cleaning agent has the following defects that the addition of a strong alkali auxiliary agent in the cleaning agent damages human skin, corrosion inhibitors are added in the cleaning agent to influence the performance of the aluminum alloy, phosphorus and silicon in the cleaning agent can harm the environment, the wastewater treatment pressure is increased, and the cleaning of a single surfactant is not thorough.

Compared with the cleaning agent, the aluminum alloy cleaning agent disclosed by the invention adopts nonionic surfactant and amphoteric surfactant, and the two surfactants are synergistic, so that the cleaning efficiency of the cleaning agent is ensured; the chelating agent, the cleaning auxiliary agent, the monoacid and the solubilizer are adopted, and no strong base auxiliary agent is added, so that the damage to human epidermis is reduced; no corrosion inhibitor is added, so that the performance of the aluminum alloy is not affected; the wastewater treatment pressure is increased without phosphorus and silicon and causing harm to the environment.

Example 2

This example relates to a method of preparation of the present invention.

A preparation method of an aluminum alloy cleaning agent comprises the following steps:

s1: heating half of the water to 20-70 ℃ according to the formula amount;

s2: adding chelating agent, and stirring uniformly;

s4: supplementing the balance of water;

Preferably, in step S1, the heating temperature is 50-60 ℃.

In some of these embodiments, in step S1, the heating is heating at atmospheric pressure.

In some of these embodiments, in step S1, heating is performed in a temperature-controllable reaction vessel.

In some of these embodiments, in step S3, the surfactant is a nonionic surfactant.

In some of these embodiments, in step S5, the surfactant is an amphoteric surfactant.

In the related art, when preparing the aluminum alloy cleaning agent, the surfactant is not easy to dissolve, so that the production efficiency of the cleaning agent is affected.

Compared with the existing preparation method of the cleaning agent, the preparation method of the aluminum alloy cleaning agent of the embodiment adopts a method of heating half of formula water, so that the surfactant can be quickly dissolved, the production efficiency of the cleaning agent is not affected, and the preparation method of the embodiment has the advantages of simple use equipment, controllable conditions and simple and easy operation steps.

Example 3

This embodiment is one embodiment of the present invention.

As shown in table 1, the aluminum alloy cleaning agent comprises the following raw materials in parts by mass: disodium ethylenediamine tetraacetate (EDTA.2Na) 0.1 parts, fatty acid methyl ester ethoxylate (FMEE) 6 parts, C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA) 2 parts, sodium gluconate 5 parts, dihydroxyethyl cyclohexylamine (CH 020) 2 parts, boric acid 6 parts, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70) 3 parts, water 75.9 parts.

The preparation method of the aluminum alloy cleaning agent comprises the following steps:

1) According to the formula, heating half of water to 50-60 ℃ in a temperature-controllable reaction kettle under normal pressure;

2) Adding chelating agent disodium ethylenediamine tetraacetate (EDTA.2Na), and stirring uniformly;

3) Adding fatty acid methyl ester ethoxylate (FMEE), stirring to dissolve completely, and stirring for 5-10min to ensure uniformity of the solution;

4) Supplementing the balance of water;

5) C9-11 ethoxylated alcohol is added in turn according to the formula: coconut alkyl quaternary amine ethoxylate mixture (226 SA), sodium gluconate, dihydroxyethyl cyclohexylamine (CH 020), boric acid and N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70), stirring for 5-10min after adding one component to ensure that the solution is uniform, and obtaining transparent solution, namely the cleaning agent.

Further, the stirring speed is preferably 1300r/min.

Example 4

This embodiment is one embodiment of the present invention.

As shown in table 1, the aluminum alloy cleaning agent comprises the following raw materials in parts by mass: disodium ethylenediamine tetraacetate (EDTA.2Na) 0.1 parts, fatty acid methyl ester ethoxylate (FMEE) 5 parts, C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA) 2 parts, sodium gluconate 4 parts, dihydroxyethyl cyclohexylamine (CH 020) 2 parts, boric acid 6 parts, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70) 3 parts, water 77.9 parts.

The formulation procedure was the same as in example 1.

Example 5

This embodiment is one embodiment of the present invention.

As shown in table 1, the aluminum alloy cleaning agent comprises the following raw materials in parts by mass: disodium ethylenediamine tetraacetate (EDTA.2Na) 0.1 parts, fatty acid methyl ester ethoxylate (FMEE) 4 parts, C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA) 3 parts, sodium gluconate 8 parts, dihydroxyethyl cyclohexylamine (CH 020) 4 parts, boric acid 8 parts, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70) 5 parts, water 67.9 parts.

The formulation procedure was the same as in example 1.

Example 6

This embodiment is one embodiment of the present invention.

As shown in table 1, the aluminum alloy cleaning agent comprises the following raw materials in parts by mass: disodium ethylenediamine tetraacetate (EDTA.2Na) 0.1 parts, fatty acid methyl ester ethoxylate (FMEE) 3 parts, C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA) 3 parts, sodium gluconate 7 parts, dihydroxyethyl cyclohexylamine (CH 020) 5 parts, boric acid 7 parts, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70) 5 parts, water 69.9 parts.

The formulation procedure was the same as in example 1.

Example 7

This embodiment is one embodiment of the present invention.

As shown in table 1, the aluminum alloy cleaning agent comprises the following raw materials in parts by mass: disodium ethylenediamine tetraacetate (EDTA.2Na) 0.1 parts, fatty acid methyl ester ethoxylate (FMEE) 6 parts, C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixture (226 SA) 2 parts, sodium gluconate 6 parts, dihydroxyethyl cyclohexylamine (CH 020) 3 parts, boric acid 5 parts, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt (LF 70) 4 parts, water 73.9 parts.

The formulation procedure was the same as in example 1.

The cleaning agents of comparative examples 1 to 10 were prepared as a control group according to the same preparation procedure, wherein the respective raw material contents of the cleaning agent formulations of comparative examples 1 to 10 are shown in table 2.

TABLE 1 raw material contents of the detergent formulations in examples 3 to 7

TABLE 2 raw material contents of the detergent formulations in comparative examples 1 to 10

Example 8

Cleaning ability test

The cleaning agents formulated in examples 3-7 and comparative examples 1-10 were tested for performance according to the test method in the industry standard JB/T4323.2-1999 Water-based Metal cleaning agent.

Gravimetric cleaning ability

The result of the test represents the cleaning efficiency of the cleaning agent on the greasy dirt, and the larger the cleaning efficiency is, the better the cleaning effect of the cleaning agent on the greasy dirt is, and the cleaner is.

The test steps are as follows:

1. preparing working solution with concentration of 5 percent:

the cleaners prepared in examples 3 to 7 and comparative examples 1 to 10 were mixed with water according to the following ratio 1:19, obtaining 5% concentration cleaning agent working solution, heating the 5% concentration cleaning agent working solution to 60+/-2 ℃ in a constant-temperature water bath kettle, and simultaneously placing distilled water in the constant-temperature water bath kettle for heating.

2. Testing

Weighing 3 polished test pieces, namely P1, immersing the test pieces in hydraulic oil required by the standard for 5min, draining for 20min after the test pieces are lifted, scraping oil drops at the bottom, weighing and namely P2, wherein P2-P1 is the oil stain dip-coating amount;

and (3) vertically fixing the test piece dip-coated with the greasy dirt on a swinging washer, respectively immersing the test piece in the cleaning agent working solution with the concentration of 5% at 60+/-2 ℃ prepared in the step (1), standing for 3min, swinging for one time per second, taking out, rinsing for 10 times in distilled water with the temperature of 60+/-2 ℃, drying for 30min in an oven with the temperature of 70+/-2 ℃, taking out, cooling to room temperature, weighing, and marking as P3.

3. Cleaning rate calculation

Calculating weight change = P2-P3, namely the weight of the cleaned oil stain;

the cleaning efficiency was calculated as follows:

cleaning efficiency = (P2-P3)/(P2-P1) ×100%

The cleaning agents prepared in examples 3 to 7 and comparative examples 1 to 10 exhibited cleaning efficiencies in gravimetric cleaning ability tests, as shown in table 3.

Dain pen test cleanliness

The dyne pen is also called as a surface tension test pen, is a commonly used cleanliness test method in industrial sites, and can analyze small changes of surface tension, hydrophilicity and the like on the solid surface. In the embodiment, a dyne pen with a dyne value of 34 is used for scribing the surface of a workpiece cleaned by different cleaning agents in the same cleaning method, and if the line is not contracted, the surface state is consistent, and no oil dirt remains; if the edges shrink and even the lines break off to form circular droplets, this represents that there is greasy dirt left on the solid surface.

As shown in fig. 1, the results of the dyne pen test of comparative example 4 and example 7 show that the line shrinks to a point due to the oil stain residue in comparative example 4, the cleaning agent of example 7 cleans the oil stain on the surface of the aluminum alloy thoroughly, and the line does not shrink.

The results of the cleaning agents prepared in examples 3 to 7 and comparative examples 1 to 10 using the dyne pen test according to the above measurement methods are shown in table 3.

Table 3 example performance test results

Based on the test piece cleaning efficiency and the dyne pen test results recorded in table 3, it was found by data comparison that:

cleaning efficiency (one)

1) The cleaning efficiency of the cleaning agent of comparative example 1 without addition of surfactants FMEE and 226SA was only 20.3%;

2) The cleaning efficiency of the comparative example 2 and the comparative example 3 added with one of the surfactants FMEE or 226SA is obviously improved, respectively is 76.4 percent and 84.6 percent, which shows that the added surfactant FMEE or 226SA has cleaning effect on greasy dirt on the surface of the aluminum alloy;

3) When two kinds of surfactants FMEE and 226SA are added at the same time, as shown in examples 3 to 7, the cleaning efficiency is further improved to 94.4% -99.4%, and it is shown that the two kinds of surfactants FMEE and 226SA have synergistic effect, and the cleaning efficiency of the cleaning agent of examples 3 to 7 is better, 98.2% and 99.4% respectively, and the synergistic effect is more obvious, wherein the cleaning efficiency of the cleaning agent of example 7 is optimal, as can be seen from the data of the cleaning efficiency of examples 3 to 7;

4) Comparative examples 4 and 5, in which a single surfactant (LF 305 surfactant or LAS surfactant) was added, were low in cleaning efficiency and did not clean the greasy dirt;

5) The cleaning efficiency of the comparative examples 6 to 9 added with the two surfactants FMEE and 226SA reaches 98.7 to 99.9 percent better;

6) Comparative example 10 is a prior formulation, which has better cleaning efficiency but contains phosphorus.

(II) Dain pen test cleanliness

1) When no or only one surfactant is added, the test results of the dyne pen show shrinkage, which indicates that the greasy dirt is not cleaned, as in comparative examples 1 to 5;

2) When two surfactants (FMEE and 226 SA) are added into the cleaning agent, the results of the dyne pen test are shown to be non-shrinking as shown in examples 3-7 and comparative examples 6-10, which indicates that no greasy dirt remains on the surface of the aluminum alloy, and the two surfactants have synergistic effect in cleaning greasy dirt on the surface of the aluminum alloy.

From the above results, it can be seen that:

1) The surfactant FMEE and 226SA have a synergistic effect, and when the weight percentage of the surfactant FMEE and 226SA is 3-5: the cleaning efficiency is better in the 1, and the preferable ratio is 3:1, a step of;

2) The cleaning auxiliary agent can be sodium gluconate, CH020, potassium hydroxide and monoethanolamine; however, when the cleaning auxiliary agent is potassium hydroxide (such as comparative example 6) or monoethanolamine (such as comparative example 7), the cleaning agent becomes strongly alkaline, and if the same effect of not corroding aluminum alloy is achieved, more monoacid needs to be added to adjust the alkalinity, and the preparation cost of the cleaning agent is relatively high, so the cleaning auxiliary agent is preferably sodium gluconate or CH020;

3) The monobasic acid may be boric acid, sulfamic acid; when the monobasic acid is adjusted in alkalinity by sulfamic acid (such as comparative example 8), the addition amount of the solubilizer is increased at the same time; when the monobasic acid is boric acid, the same effect of regulating the alkalinity is achieved, the use amount of the solubilizer is relatively low, and the cost is saved, so that the monobasic acid is preferably boric acid;

4) The solubilizer can be LF70 or octanoic acid; when the solubilizer is octanoic acid (as in comparative example 9), more solubilizer is needed to achieve the same solubilization effect when LF70 is used, and the preparation cost of the cleaning agent is increased, so that the solubilizer is preferably LF70;

5) Comparative examples 6 to 9 have better cleaning efficiency, but when the same cleaning efficiency is achieved, the content of the monoacid or the solubilizer added is higher, and the cost of the formulation is relatively higher;

6) The comparative example 10 contains phosphorus and corrosion inhibitor, although the cleaning efficiency is better, the phosphorus brings pressure to the wastewater treatment and the corrosion inhibitor of aluminum can lose efficacy after long-time storage, so that the aluminum alloy is easy to be corroded;

7) The cleaning agents prepared in examples 3 to 7 do not contain strong alkali, phosphorus, silicon and corrosion inhibitors, and the synergistic effect of the two surfactants shows excellent cleaning effect, so that the problems that the strong alkali-containing auxiliary agent in the cleaning agent damages the human epidermis, the corrosion inhibitors are added in the cleaning agent to influence the performance of aluminum alloy, the phosphorus and the silicon in the cleaning agent can harm the environment, the waste water treatment pressure is increased, and the cleaning of a single surfactant is not thorough are solved, and the cost of preparing the cleaning agent is low, so that the cleaning agent is a better aluminum alloy cleaning agent. Therefore, the cleaning agent prepared by the invention has important value and significance in the application of cleaning the oil stains of the aluminum alloy.

Example 9

Corrosion Performance test

The purpose of this test was to test the corrosion performance of the cleaning agents of examples 3 to 7 and comparative examples 1 to 10 on aluminum alloys, and the general corrosion grade of aluminum alloy cleaning agents should be 0 grade or 1 grade, and the corrosion performance rating criteria of metals are shown in Table 4:

TABLE 4 Metal Corrosion Performance rating criteria

The test steps are as follows:

1. preparing a cleaning working solution:

the cleaning agents prepared in examples 3 to 7 and comparative examples 1 to 10 were mixed with water according to the following ratio 1:19, preparing a cleaning working solution with the concentration of 5%;

respectively placing 5% cleaning working solution in 500mL wide-mouth bottles;

the cleaning liquid at 5% concentration was heated to 70.+ -. 2 ℃.

2. Selecting test pieces and weighing

The aluminum alloy coupon of the conventional work piece material was weighed on an analytical balance (accurate to 0.1 mg) and noted as m1.

3. Testing

Hanging the test piece by using a nylon rope, placing the test piece in 5% concentration cleaning working solution in a wide-mouth bottle, wherein the liquid level of the cleaning working solution is 10mm lower than the top end of the test piece, namely, keeping the test piece 10mm from being immersed in the working solution, and standing at constant temperature for 2h;

after the soaking time is over, the test piece is taken out and then is put into distilled water for cleaning, absolute ethyl alcohol is used for wiping the test piece, and the test piece can be completely and naturally volatilized after being placed for tens of seconds.

4. Results observations and recordings

Comparing and checking the appearance of the part immersed in the working solution and the part not immersed in the working solution on the test piece after the absolute ethyl alcohol is completely volatilized, and recording the appearance change, wherein the observation result is shown in table 5;

the blow-dried test piece was weighed and recorded as m2, and the mass change g=m1-m 2, and the mass change result is shown in table 5.

As shown in FIG. 2, the comparative example 7 and the external image of the corrosiveness test of example 7 show that the comparative example 7 has a corrosion boundary, and the lower part of the soaked test piece is whitened in color, which is clearly different from the upper half of the non-soaked test piece and the non-corrosiveness example 7.

In the corrosion performance test, the test results of the corrosion performance of the cleaning agents of examples 3 to 7 and comparative examples 1 to 10 on the test piece are shown in Table 5.

TABLE 5 results of Metal Corrosion Performance test

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From the weight change and the appearance change of the test pieces recorded in table 5, the following results were found by data comparison:

1) The weight change of the aluminum alloy test pieces treated by the cleaning agent in the examples 3-7 is less than 2mg, the surface of the aluminum alloy is unchanged, the aluminum alloy test pieces belong to grade 0, and the cleaning agent components in the examples 3-7 are not corrosive to the aluminum alloy;

2) The surfaces of the aluminum alloy test pieces cleaned by the cleaning agents of the comparative examples 1 to 5 are unchanged, which indicates that the components of the cleaning agents of the comparative examples 1 to 5 are non-corrosive to the aluminum alloy;

3) The surface appearance of the comparative examples 6 and 7 is uneven or obviously discolored, and the surface of the aluminum alloy is corroded during cleaning, so that the performance of the aluminum alloy is affected;

4) The surfaces of the aluminum alloy test pieces cleaned by the cleaning agents of the comparative examples 8-9 are unchanged, which indicates that the components of the cleaning agents of the comparative examples 8-9 are non-corrosive;

5) The surface of the aluminum alloy test piece cleaned by the cleaning agent of comparative example 10 is unchanged, which indicates that the cleaning agent has no corrosiveness to the surface of the aluminum alloy after the aluminum corrosion inhibitor is added in comparative example 10, but the comparative example 10 contains phosphorus.

From the above, the components in the cleaning agent formulations prepared in examples 3 to 7, 1 to 5 and 8 to 9 are safer, namely, when the chelating agent is EDTA.2Na, the nonionic surfactant is FMEE, LF305 and LAS, the amphoteric surfactant is 226SA, the cleaning aid is sodium gluconate and CH020, the monoacid is boric acid and sulfamic acid, the solubilizer is LF70 and octanoic acid, the cleaning agent does not corrode the aluminum alloy when cleaning the aluminum alloy, does not affect the performance of the aluminum alloy, and the problem that the corrosion inhibitor is added to affect the performance of the aluminum alloy is solved, so that the cleaning agent has important application significance and value in cleaning greasy dirt on the solid surface of the aluminum alloy.

Example 10

Oil dissolution test of cleaning agent

The emulsifying property represents the combination ability of the surfactant and the oil stain on the workpiece, and the emulsifying property is strong, so that the combination ability with the oil stain is strong, the oil stain can be better stripped from the surface of the workpiece, and the cleaning efficiency is improved.

When the oil dirt content in the cleaning agent working fluid reaches a critical value, the cleaning effect is lost, so that the oil-floating performance of the cleaning agent is increased by adding certain surfactants with the oil-floating performance, oil dirt can be removed by skimming through an oil removing device after floating, and the service life of the working fluid is prolonged.

The test steps are as follows:

1. preparation of cleaning agent working solution with concentration of 10%

Working solution 1: the cleaning agent of example 7 was mixed with water at a ratio of 1:9, diluting to obtain a cleaning agent working solution 1 with the concentration of 10%;

working solution 2: the cleaner of comparative example 10 was mixed with water at a ratio of 1:9, diluting to obtain the cleaning agent working solution 2 with the concentration of 10%.

2. Testing

Respectively taking 90mL of the working solution 1 and the working solution 2 prepared in the step 1, and placing the working solution 1 and the working solution 2 in a clean test tube;

5mL of hydraulic oil is respectively added into test tubes of the working solution 1 and the working solution 2;

respectively heating the working solution 1 and the working solution 2 added with hydraulic oil in a constant-temperature water bath kettle to 60 ℃ and shaking the working solution 10;

the appearances of the working fluid 1 and the working fluid 2 were observed.

3. Observation result

The emulsion state of the cleaning agent in example 7 and comparative example 4 after shaking the oil layer was observed.

As can be seen from fig. 1, the cleaning agent of comparative example 4 was completely emulsified in the oil layer after shaking; the uppermost layer of the cleaning agent in example 7 is an oil layer, followed by an emulsion layer, and the lowermost layer is a working fluid. Therefore, the cleaning agent in the embodiment 7 can also play a role in suspending oil stains, the effect is favorable for floating the cleaned oil stains in industrial production, the floating oil stains are convenient to skim, the cleaning agent can continuously clean the oil stains on the surface of the aluminum alloy, the service life of the cleaning agent is prolonged, the cleaning cost is saved, and the cleaning agent has important application value in improving the cleaning life of the cleaning agent.

The result shows that the cleaning agent provided by the invention has the advantages of high cleaning efficiency, safe components, less reagent consumption in the formula, no corrosiveness to the surface of the aluminum alloy during cleaning, no strong alkali, aluminum corrosion inhibitor, phosphorus and silicon, no harm to human body, no influence on the performance of the aluminum alloy and environmental protection; the cleaning agent has low preparation environment and equipment requirements, and the preparation steps are simple and feasible; on the other hand, the oil layer can be separated during use, the service life of the cleaning agent is prolonged, and the cost is further saved, so that the cleaning agent has important application significance in the technical field of cleaning agents.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. The aluminum alloy cleaning agent is characterized by comprising the following components in percentage by weight:

0.1-0.5% of chelating agent;

4-8% of a surfactant;

cleaning auxiliary agent, 6-12%;

monoacids, 5-10%;

3-5% of solubilizer;

water, balance.

2. The aluminum alloy cleaning agent according to claim 1, wherein the chelating agent comprises one or more of disodium edetate, tetrasodium edetate, hydroxyethylidene diphosphonic acid, ethylenediamine tetramethylene phosphonic acid, sodium gluconate; and/or

The surfactant comprises one or more of nonionic surfactant, anionic surfactant, cationic surfactant and nonionic/cationic amphoteric surfactant, wherein the nonionic surfactant comprises fatty acid methyl ester ethoxylate, fatty alcohol EO-PO block polyether, isomeric tridecanol polyoxyethylene ether and rosin modified derivative; anionic surfactants include sodium dodecyl benzene sulfonate; cationic surfactants include polyquaternium; amphoteric surfactants include C9-11 ethoxylated alcohols: coconut alkyl quaternary amine ethoxylate mixtures; and/or

The cleaning auxiliary agent comprises any two of sodium gluconate, sodium hydroxide, potassium carbonate, potassium hydroxide, triethanolamine, monoethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol and dihydroxyethyl cyclohexylamine; and/or

The monobasic acid comprises one or more of gluconic acid, citric acid, boric acid and sulfamic acid; and/or

The solubilizer comprises one or more of caprylic acid, isononanoic acid, neodecanoic acid, phosphoric acid polyether ester potassium salt and N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt.

3. The aluminum alloy cleaning agent according to claim 2, wherein the components of the surfactant are nonionic surfactant and amphoteric surfactant; and/or

The cleaning auxiliary agent comprises sodium gluconate and dihydroxyethyl cyclohexylamine; and/or

The monobasic acid is boric acid; and/or

The solubilizer is N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt.

4. The aluminum alloy cleaning agent according to claim 3, wherein a weight ratio of the nonionic surfactant to the amphoteric surfactant is 3 to 5:1, a step of; and/or

The weight ratio of the sodium gluconate to the dihydroxyethyl cyclohexylamine is 1-3:1.

5. the aluminum alloy cleaning agent according to claim 4, wherein a weight ratio of the nonionic surfactant to the amphoteric surfactant is 3:1, a step of; and/or

The weight ratio of the sodium gluconate to the dihydroxyethyl cyclohexylamine is 2:1.

6. the aluminum alloy cleaning agent as recited in claim 4 or 5, wherein the nonionic surfactant comprises fatty acid methyl ester ethoxylate;

the amphoteric surfactant comprises a C9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixtures.

7. A method for preparing the aluminum alloy cleaning agent according to any one of claims 1 to 6, characterized by comprising:

s1: heating half of the water to 20-70 ℃ according to the formula amount;

s2: adding chelating agent, and stirring uniformly;

s4: supplementing the balance of water;

8. The method of manufacturing according to claim 7, comprising:

s1: heating half of the water to 20-70 ℃ according to the formula amount;

s2: adding chelating agent, and stirring uniformly;

s4: supplementing the balance of water;

9. The preparation method according to claim 7 or 8, characterized by comprising:

s1: heating half of the water to 50-60 ℃ according to the formula amount;

s2: adding disodium ethylenediamine tetraacetate and stirring uniformly;

s4: supplementing the balance of water;

s5: sequentially adding according to the formula: c9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixture, sodium gluconate, dihydroxyethyl cyclohexylamine, boric acid, N- (2-hydroxyethyl) -N- (2-ethylhexyl) -beta-alanine monosodium salt, stirring for 5-10min after each component is added to ensure that the solution is uniform, and obtaining transparent solution, namely the cleaning agent;

10. Use of an aluminum alloy cleaning agent according to any one of claims 1 to 6 or an aluminum alloy cleaning agent prepared by a preparation method according to any one of claims 7 to 9, characterized in that the use is selected from at least one of the following applications: the application of the cleaning agent in cleaning oil stains on the solid surface of the aluminum alloy and the application in improving the cleaning life of the cleaning agent.