CN106947979B

CN106947979B - Magnesium-aluminum alloy cleaning agent

Info

Publication number: CN106947979B
Application number: CN201710173780.3A
Authority: CN
Inventors: 包亚群
Original assignee: Guangzhou 1s Environmental Protection Technology Co ltd
Current assignee: Guangzhou 1s Environmental Protection Technology Co ltd
Priority date: 2017-03-22
Filing date: 2017-03-22
Publication date: 2020-08-14
Anticipated expiration: 2037-03-22
Also published as: CN106947979A

Abstract

The invention relates to a magnesium-aluminum alloy cleaning agent which comprises a weakly alkaline substance, a surfactant, a cleaning auxiliary agent, a corrosion inhibitor, an environment-friendly solvent and water, wherein the surfactant comprises isomeric alcohol ether and alkyl glycoside. The cleaning agent has the advantages of good cleaning effect, alkalescence, low corrosivity to magnesium-aluminum alloy, easy biodegradation, environmental friendliness and small harm to human bodies.

Description

Magnesium-aluminum alloy cleaning agent

Technical Field

The invention belongs to the technical field of cleaning agents, and particularly relates to a magnesium-aluminum alloy cleaning agent.

Background

Along with popularization and development of electronic products such as smart phones, tablet computers, sports bracelets and the like, magnesium-aluminum alloy is gradually widely applied due to the characteristics of light weight and high strength. However, in the metal processing process, the processed workpiece may absorb some foreign matters such as oil stains and dust, which may have a great influence on the subsequent process, and thus a cleaning process for removing oil and scale is required.

At present, most of water-based cleaning agents in the market are used for cleaning ferrous metals, the cleaning agents suitable for magnesium-aluminum alloys are few, and people mainly adopt degreasing powder to clean the magnesium-aluminum alloys. The oil removing powder mostly uses strong alkali such as sodium hydroxide or potassium hydroxide, can cause damage such as corrosion to the magnesium aluminum alloy workpiece, and the cleaning effect is poor, the speed is slow, and the requirements of the workpiece processing technology can not be met.

CN 104947126A discloses a magnesium alloy cleaning agent, which consists of the following components in concentration: 50-120 g/L of alkali, 5-50 g/L of additive, 1-5 g/L of complexing agent, 1-5 g/L of wetting agent and the balance of water. The components of the invention do not contain strong acid, chromate and fluoride, thus not polluting the environment, not over-corroding the magnesium alloy and not damaging the magnesium alloy on the basis of completely cleaning the magnesium alloy. However, the alkali in the above cleaning agent is selected from sodium hydroxide and/or potassium hydroxide, which also has an influence on the environment, and strong alkali corrodes aluminum, so that it is not suitable for cleaning of magnesium-aluminum alloy.

CN 104451709A discloses a water-based cleaning agent for magnesium-aluminum alloy surfaces, which comprises the following components: surfactant AO 902.5-3.0 g/L, surfactant SDBS 2.0-2.5g/L, surfactant NP-102.0-2.2 g/L, builder 0.5-0.6g/L, composite corrosion inhibitor 0.8-1g/L, and water as solvent. The cleaning agent contains three surfactants, but the effects of the three surfactants are simply superposed, alkaline substances are not contained, the cleaning effect is general, and the consumption of the cleaning agent is large.

Therefore, it is very important to develop a novel magnesium aluminum alloy cleaning agent.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the magnesium-aluminum alloy cleaning agent which is good in cleaning effect, weak in alkaline, low in corrosivity to magnesium-aluminum alloy, easy to biodegrade, environment-friendly and small in harm to human bodies.

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

the invention provides a magnesium-aluminum alloy cleaning agent which comprises a weakly alkaline substance, a surfactant, a cleaning auxiliary agent, a corrosion inhibitor, an environment-friendly solvent and water, wherein the surfactant comprises isomeric alcohol ether and alkyl glycoside.

In a preferred embodiment of the present invention, the surfactant is present in an amount of 8 to 20% by mass, for example, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20% by mass, but the amount is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable, preferably 10 to 15%.

Preferably, the mass ratio of the isomeric alcohol ether to the alkyl glycoside is (1.5 to 1.8):1, such as 1.5:1, 1.55:1, 1.6:1, 1.65:1, 1.7:1, 1.75:1, or 1.8:1, but not limited to the recited values, and other values within this range are equally applicable, and more preferably 1.6: 1.

The isomerous alcohol ether and the alkyl glycoside surfactant act synergistically to form a mixed monomolecular adsorption layer, and a mixed micelle is formed in the solution, so that the binding capacity of the surfactant and oil stains is improved, and the cleaning capacity of the cleaning agent is improved. The surface tension of the system is gradually reduced along with the addition of the alkyl glycoside, when the addition amount of the alkyl glycoside exceeds 5%, the surface tension of the system is not greatly changed, and the excessive alkyl glycoside can cause excessive foam of the cleaning agent to influence the later rinsing, so that the addition amount of the alkyl glycoside is preferably not more than 5%.

Meanwhile, the cleaning agent in the prior art usually contains strong base, and the strong base can react with animal and vegetable oil to improve the oil stain removal effect, while the alkyl glycoside and the isomeric alcohol ether are used together to improve the oil stain removal capability of the cleaning agent, so that weak base can be used for replacing strong base, and the corrosion of the strong base to the magnesium-aluminum alloy is avoided. When the addition amount of the isomeric alcohol ether is 1.5-1.8 times of that of the alkyl glycoside, the surface tension of the cleaning agent is the lowest, the cleaning effect is the best, and the decontamination effect can completely replace the effect of strong alkali.

In a preferred embodiment of the present invention, the mass fraction of the weakly basic substance is 5 to 15%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable, preferably 8 to 12%.

Preferably, the mass fraction of the cleaning aid is 5 to 15%, such as 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15%, but not limited to the recited values, and other values not recited within the range of the values are also applicable, and more preferably 8 to 12%.

Preferably, the mass fraction of the corrosion inhibitor is 1-5%, such as 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, but not limited to the recited values, and other values not recited within the range of values are also applicable.

Preferably, the environmentally friendly solvent is present in a mass fraction of 1 to 10%, such as 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10%, but not limited to the recited values, and other values not recited within the range of values are also applicable, and more preferably 3 to 8%.

As a preferable technical scheme of the invention, the cleaning agent comprises the following components in percentage by mass:

as a preferred embodiment of the present invention, the weakly basic substance comprises any one or a combination of at least two of diethylamine, triethylamine, ethanolamine, diethanolamine or dicyclohexylamine, and the combination is exemplified by, but not limited to: combinations of diethylamine and triethylamine, diethylamine and ethanolamine, ethanolamine and diethanolamine, diethanolamine and dicyclohexylamine, diethylamine and dicyclohexylamine, or diethylamine, diethanolamine and dicyclohexylamine, and the like.

As a preferred embodiment of the present invention, the isomeric alcohol ether includes any one or a combination of at least two of isomeric tridecanol polyoxyethylene ether, isooctanol polyoxyethylene ether or isomeric tridecanol polyoxyethylene ether, and typical but non-limiting examples of the combination include a combination of isomeric tridecanol polyoxyethylene ether and isooctanol polyoxyethylene ether, a combination of isooctanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene ether, a combination of isomeric tridecanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene ether or a combination of isomeric tridecanol polyoxyethylene ether, isooctanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene ether, and the like.

Preferably, the alkyl glycoside comprises any one of, or a combination of at least two of, APG081, APG1214, APG10 or APG06, typical but non-limiting examples being the combination of APG081 and APG1214, the combination of APG1214 and APG10, the combination of APG10 and APG06, the combination of APG06 and APG081, or the combination of APG081, APG1214 and APG10, and the like.

As a preferred technical solution of the present invention, the cleaning assistant comprises any one or a combination of at least two of potassium silicate, sodium metasilicate pentahydrate, sodium gluconate, and potassium pyrophosphate, and the combination is typically but not limited to: combinations of potassium silicate and sodium metasilicate pentahydrate, sodium metasilicate pentahydrate and sodium gluconate, sodium gluconate and potassium pyrophosphate, potassium silicate and potassium pyrophosphate, or combinations of potassium silicate, sodium metasilicate pentahydrate and sodium gluconate, and the like.

Preferably, the cleaning auxiliary agent contains a complexing agent.

Preferably, the mass fraction of the complexing agent is 3-7%, such as 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, or 7%, but not limited to the recited values, and other values not recited within the range of values are also applicable.

Preferably, the complexing agent comprises any one of, or a combination of at least two of, tetrasodium ethylenediaminetetraacetic acid, tetrasodium hydroxyethylidene diphosphonate, or disodium hydroxyethylidene diphosphonate, typical but non-limiting examples of such combinations being: the composition of the tetrasodium ethylene diamine tetracetate and the tetrasodium hydroxyethylidene diphosphonate, the composition of the tetrasodium hydroxyethylidene diphosphonate and the disodium hydroxyethylidene diphosphonate, the composition of the tetrasodium ethylene diamine tetracetate and the disodium hydroxyethylidene diphosphonate or the composition of the tetrasodium ethylene diamine tetracetate, the tetrasodium hydroxyethylidene diphosphonate and the disodium hydroxyethylidene diphosphonate and the like.

As a preferred embodiment of the present invention, the corrosion inhibitor comprises any one or a combination of at least two of thiourea, heterocyclic amine, sodium molybdate or sodium metasilicate, and the combination is exemplified by, typically but not limited to: combinations of thiourea and heterocyclic amines, heterocyclic amines and sodium molybdate, sodium molybdate and sodium metasilicate, sodium metasilicate and thiourea, or thiourea, heterocyclic amines and sodium molybdate, and the like.

Preferably, the eco-friendly solvent includes any one or a combination of at least two of isopropyl alcohol, propylene glycol methyl ether, propylene glycol tertiary-butyl ether, or dipropylene glycol methyl ether, as typical but non-limiting examples thereof: combinations of isopropyl alcohol and propylene glycol, propylene glycol and propylene glycol methyl ether, propylene glycol methyl ether and propylene glycol tertiary butyl ether, propylene glycol tertiary butyl ether and dipropylene glycol methyl ether, or propylene glycol, propylene glycol methyl ether and propylene glycol tertiary butyl ether, and the like.

Compared with the prior art, the invention has at least the following beneficial effects:

(1) according to the magnesium-aluminum alloy cleaning agent provided by the invention, the cleaning agent adopts the synergistic effect of isomeric alcohol ether and alkyl glycoside, so that excellent cleaning performance is obtained, namely, the water drop angle of the surface of the magnesium-aluminum alloy cleaned by the cleaning agent is less than 90 degrees and can reach 60 degrees at the minimum;

(2) according to the magnesium-aluminum alloy cleaning agent provided by the invention, the quality of the magnesium-aluminum alloy cleaned by using the cleaning agent and the quality of the magnesium-aluminum alloy before cleaning are changed to-0.01 g, which shows that the cleaning agent has extremely low corrosivity on the magnesium-aluminum alloy;

(2) the magnesium-aluminum alloy cleaning agent provided by the invention is weak in alkali, high in efficiency, easy to biodegrade, environment-friendly and harmless to human bodies.

Detailed Description

The specific embodiment of the invention provides a cleaning agent which comprises a weakly alkaline substance, a surfactant, a cleaning auxiliary agent, a corrosion inhibitor, an environment-friendly solvent and water, wherein the surfactant comprises isomeric alcohol ether and alkyl glycoside.

For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Example 1

The magnesium-aluminum alloy cleaning agent comprises the following components in percentage by mass:

example 2

example 3

example 4

example 5

example 6

example 7

example 8

comparative example 1

A magnesium aluminum alloy detergent was prepared in the same manner as in example 1 except that APG-0810 was replaced with isotridecanol polyoxyethylene ether of the same mass.

Comparative example 2

A magnesium aluminum alloy detergent was prepared under the same conditions as in example 1 except that isomeric tridecanol polyoxyethylene ether was replaced with APG-0810 of equal mass.

Comparative example 3

A magnesium aluminum alloy cleaner was prepared in the same manner as in example 1 except that it contained neither isotridecanol polyoxyethylene ether nor APG-0810.

Comparative example 4

The alloy-free cleaning agent described in example 1 in CN 104947126A was used, and consists of the following components in concentration: 70g/L of sodium hydroxide, 20g/L of sodium phosphate, 2g/L of sodium citrate, 2g/L of sodium dodecyl benzene sulfonate, 3g/L of alkylphenol polyoxyethylene and water as a solvent.

Cleaning the surfaces of the magnesium-aluminum alloys with uniform specifications by using the cleaning agents described in examples 1-8 and comparative examples 1-3, and performing a water drop angle test on the cleaned surfaces; the quality change of the magnesium-aluminum alloy before and after cleaning is tested by adopting the specification of national standard HGT3523-2008, and the test result is shown in Table 1.

TABLE 1

Item	Angle/degree of water drop	Change in mass/g
			Example 1	61	-0.01
Example 2	66	-0.01
			Example 3	59	-0.01
Example 4	61	-0.01
			Example 5	60	-0.01
Example 6	62	-0.01
			Example 7	71	-0.01
Example 8	75	-0.01
			Comparative example 1	91	-0.01
Comparative example 2	93	-0.01
			Comparative example 3	99	-0.01
Comparative example 4	91	-0.25

From the tests of the examples 1 to 8, it can be seen that the water drop angle of the surface of the magnesium-aluminum alloy cleaned by the magnesium-aluminum alloy cleaning agent disclosed by the invention is less than 90 degrees and can reach 60 degrees at least, and the clean metal surface is hydrophilic, so that the contact angle is less than 90 degrees, which shows that the hydrophilicity is good, and the cleanness and the residue of the surface of the magnesium-aluminum alloy cleaned by the magnesium-aluminum alloy cleaning agent disclosed by the invention are good. The mass ratio of the isomeric alcohol ether to the intractable glucoside in the example 7 is 1:1 and is less than 1.5:1, the mass ratio of the isomeric alcohol ether to the intractable glucoside in the example 8 is 10:3 and is more than 1.8:1, the contact angles of the surfaces of the magnesium-aluminum alloy cleaned by the cleaning agents in the examples 7 and 8 are 71 degrees and 75 degrees, and the cleaning effect is reduced compared with the cleaning effects in the examples 1-6.

According to the cleaning agent disclosed by the invention, the cleaning agent in the comparative example 1 is added with isomeric alcohol ether, the cleaning agent in the comparative example 2 is not added with alkyl glycoside, the cleaning agent in the comparative example 3 is added with isomeric alcohol ether or not added with alkyl glycoside, the water drop angles of the magnesium-aluminum metal cleaned by the cleaning agent in the comparative examples 1-3 are all larger than 90 degrees, the magnesium-aluminum metal cleaned by the cleaning agent in the comparative example 4 adopts the magnesium alloy cleaning agent in the prior art, the contact angle page of the magnesium-aluminum alloy surface after cleaning is larger than 90 degrees, and the magnesium-aluminum metal surface cleaned. Comparative example 4 the mass of the washed magnesium aluminum alloy was reduced by 0.25g, while examples 1-8 and comparative examples 1-3 were reduced by only 0.01g, demonstrating that the cleaning agent described in comparative example 4 is corrosive to magnesium aluminum alloys, while examples 1-8 and comparative examples 1-3 are less corrosive to magnesium aluminum alloys.

The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims

1. The magnesium-aluminum alloy cleaning agent is characterized by comprising the following components in parts by mass:

5-15% of alkalescent substances;

8-20% of a surfactant;

5-15% of a cleaning assistant;

1-5% of a corrosion inhibitor;

1-10% of an environment-friendly solvent;

the balance of water;

wherein the surfactant is isomeric alcohol ether and alkyl glycoside;

the addition amount of the alkyl glycoside is not more than 5%, and the mass ratio of the isomeric alcohol ether to the alkyl glycoside is (1.5-1.8): 1;

wherein the isomeric alcohol ether comprises any one or the combination of at least two of isomeric tridecanol polyoxyethylene ether, isomeric octanol polyoxyethylene ether or isomeric decanol polyoxyethylene ether;

the weak alkaline substance comprises any one or the combination of at least two of diethylamine, triethylamine, ethanolamine, diethanolamine or dicyclohexylamine.

2. The cleaning agent according to claim 1, wherein the surfactant is contained in an amount of 10 to 15% by mass.

3. The cleaning agent according to claim 1, wherein the mass ratio of the isomeric alcohol ether to the alkyl glycoside is 1.6: 1.

4. The cleaning agent according to claim 1, wherein the weakly basic substance is contained in an amount of 8 to 12% by mass.

5. The cleaning agent according to claim 1, wherein the mass fraction of the cleaning auxiliary is 8 to 12%.

6. The cleaning agent according to claim 1, wherein the environmentally friendly solvent is present in an amount of 3 to 8% by mass.

7. The cleaning agent according to claim 1, wherein the composition of the cleaning agent comprises, in mass fraction:

8-12% of weak alkaline substances;

10-15% of a surfactant;

8-12% of a cleaning assistant;

1-5% of a corrosion inhibitor;

3-8% of an environment-friendly solvent;

the balance being water.

8. The cleaning agent according to claim 7, wherein the composition of the cleaning agent comprises, in mass fraction:

10% of alkalescent substance;

13% of a surfactant;

10% of cleaning auxiliary agent;

3% of corrosion inhibitor;

7% of an environment-friendly solvent;

57% of water.

9. The cleaning agent according to claim 1, wherein the alkyl glycoside comprises any one of or a combination of at least two of APG081, APG1214, APG10, or APG 06.

10. The cleaning agent as claimed in claim 1, wherein the cleaning assistant comprises one or a combination of at least two of potassium silicate, sodium metasilicate pentahydrate, sodium gluconate and potassium pyrophosphate.

11. The cleaning agent according to claim 1, wherein the cleaning assistant comprises a complexing agent.

12. The cleaning agent according to claim 11, wherein the complexing agent is present in an amount of 3 to 7% by mass.

13. The cleaning agent according to claim 11, wherein the complexing agent comprises any one or a combination of at least two of tetrasodium ethylenediaminetetraacetate, tetrasodium hydroxyethylidene diphosphonate, or disodium hydroxyethylidene diphosphonate.

14. The cleaning agent according to claim 1, wherein the corrosion inhibitor comprises any one or a combination of at least two of thiourea, a heterocyclic amine, sodium molybdate or sodium metasilicate.

15. The cleaning agent as defined in claim 1, wherein the environmentally friendly solvent comprises any one or a combination of at least two of isopropyl alcohol, propylene glycol methyl ether, propylene glycol tertiary butyl ether or dipropylene glycol methyl ether.