阅读说明：本技术 一种镀锌液及其配置方法 (Zinc plating solution and preparation method thereof ) 是由 赵欣泰 赵�权 孙长志 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种镀锌液及其配置方法。它包括如下重量份数的组分：氯化锌30-50份、氯化钾100-200份、硼酸10-30份、亮氨酸2-8份、3-(4-叔丁基苯基)-2-异丁醛2-8份、光亮剂10-20份、水800-1200份。采用本发明的镀锌液,对金属表面进行镀锌,能显著抑制硫酸盐还原菌的生长与代谢,防止微生物对海洋船只等的腐蚀,降低了海洋运输的成本。(The invention discloses a zinc plating solution and a preparation method thereof. The paint comprises the following components in parts by weight: 30-50 parts of zinc chloride, 100-200 parts of potassium chloride, 10-30 parts of boric acid, 2-8 parts of leucine, 2-8 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10-20 parts of a brightening agent and 1200 parts of water. The galvanizing solution provided by the invention is used for galvanizing the metal surface, can obviously inhibit the growth and metabolism of sulfate reducing bacteria, prevents microorganisms from corroding ocean ships and the like, and reduces the ocean transportation cost.)

1. The zinc plating solution is characterized by comprising the following components in parts by weight: 30-50 parts of zinc chloride, 100-200 parts of potassium chloride, 10-30 parts of boric acid, 2-8 parts of leucine, 2-8 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10-20 parts of a brightening agent and 1200 parts of water.

2. The zinc plating solution according to claim 1, wherein the brightening agent is one or more of saccharin, benzalacetone, sodium benzoate, salicylaldehyde and 2, 4-dichlorobenzaldehyde.

3. The preparation method of the zinc plating solution as defined in claim 1-2, wherein the zinc plating solution is obtained by dissolving 30-50 parts by weight of zinc chloride, 100-200 parts by weight of potassium chloride and 10-30 parts by weight of boric acid with 100-200 parts by weight of water, and then adding 2-8 parts by weight of leucine, 2-8 parts by weight of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10-20 parts by weight of brightener and 700-1000 parts by weight of water to mix uniformly.

4. A preparation method of galvanized metal is characterized by comprising the following steps:

(1) cleaning and drying the metal surface, placing the metal surface in the galvanizing solution prepared in the claim 3, taking the metal as a cathode and a zinc plate as an anode, and electroplating by adopting direct current deposition to prepare a galvanizing layer.

(2) Cleaning the galvanized metal in the step (1) with deionized water, and soaking in alkali liquor for 20-80 s;

(3) and (3) cleaning the metal surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution for 4-16h, taking out, and drying to obtain the galvanized metal.

5. The method for producing a zinc-plated metal according to claim 4, wherein the metal is copper, iron or stainless steel.

6. The process for producing a zinc-plated metal according to claim 4, wherein the alkali solution is a sodium hydroxide solution having a concentration of 1 to 3 mol/L.

7. The method for producing a zinc-plated metal according to claim 4, wherein the straight line is usedWhen electroplating is carried out by galvanic deposition, the current density is 3-15A/dm²The temperature of the galvanizing solution is 20-50 ℃, and the electroplating time is 30-80 min.

8. The method for producing a zinc-plated metal according to claim 4, wherein the concentration of the stearic acid solution is 0.01 to 0.1 mol/L.

Technical Field

The invention belongs to the technical field of metal surface treatment, and particularly relates to a zinc plating solution and a preparation method thereof.

Background

In marine environments, corrosion caused by microbial activity is an important form of corrosion damage to marine steel structures such as oil platforms, pipelines, docks, and the like. The marine microorganisms are various in types, attach to the surface of a non-toxic material exposed in a marine environment to gradually form a biofilm, the environmental parameters of the internal microenvironment of the biofilm are obviously different from those of a seawater environment, and meanwhile, the activity of the microorganisms in the biofilm obviously influences the electrochemical reaction in the corrosion process to cause local corrosion in different forms. The process of corrosion of materials in marine environments due to the life activities of various microorganisms is collectively referred to as microbial corrosion.

The corrosion microorganisms discovered at present are generally studied widely as bacteria corrosion microorganisms by participating in the geochemical cycle process of elements such as sulfur, iron and the like in the environment, and mainly include Sulfate Reducing Bacteria (SRB), Sulfur Oxidizing Bacteria (SOB), Iron Oxidizing Bacteria (IOB), Manganese Oxidizing Bacteria (MOB) and the like. SRB is one of the most important bacteria causing anaerobic corrosion of metal materials, is a heterogeneous anaerobic bacterium and can transfer electrons obtained in the process of oxidizing organic matters to sulfate, obtain energy in the process and maintain self growth.

At present, the prevention and control method for the biofouling mainly focuses on electrochemistry and coating, and the application of the coating in the marine antifouling is less researched. The electrochemical plating layer is a metal or alloy deposition layer which is uniform, compact and well combined and is formed on the surface of a manufactured part by utilizing metal electrodeposition. In the electrodeposition process of the coating, the compound organic additive can be adsorbed on the surface active site of the coating, and can also be mixed into the coating by complexing action or directly obtaining electrons at the cathode to prepare the organic compound zinc coating, so that the coating has a plurality of special properties. The previous researches on the modification of the coating by additives mainly focus on the wear resistance and corrosion resistance of the coating, and the researches on the antibacterial and antifouling performances of the coating applied in the marine environment are less.

Disclosure of Invention

The invention aims to provide a galvanizing solution and a preparation method thereof.

The galvanizing solution comprises the following components in parts by weight: 30-50 parts of zinc chloride, 100-200 parts of potassium chloride, 10-30 parts of boric acid, 2-8 parts of leucine, 2-8 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10-20 parts of a brightening agent and 1200 parts of water.

The brightener is one or more of saccharin, benzalacetone, sodium benzoate, salicylaldehyde and 2, 4-dichlorobenzaldehyde.

The preparation method of the zinc plating solution comprises the steps of dissolving 30-50 parts by weight of zinc chloride, 100-200 parts by weight of potassium chloride and 10-30 parts by weight of boric acid with 200 parts by weight of 100-200 parts by weight of water, and then adding 2-8 parts by weight of leucine, 2-8 parts by weight of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10-20 parts by weight of brightener and 1000 parts by weight of 700-0 parts by weight of water for uniform mixing to obtain the zinc plating solution.

A preparation method of galvanized metal comprises the following steps:

(1) cleaning the metal surface, drying, placing in the prepared galvanizing solution, electroplating by adopting direct current deposition by taking metal as a cathode and a zinc plate as an anode to prepare a galvanizing layer;

(2) cleaning the galvanized metal in the step (1) with deionized water, and soaking in alkali liquor for 20-80 s;

(3) and (3) cleaning the metal surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution for 4-16h, taking out, and drying to obtain the galvanized metal.

The metal is copper, iron or stainless steel.

The alkali liquor is sodium hydroxide solution, and the concentration is 1-3 mol/L.

When the direct current deposition is adopted for electroplating, the current density is 3-15A/dm²The temperature of the galvanizing solution is 20-50 ℃, and the electroplating time is 30-80 min.

The concentration of the stearic acid solution is 0.01-0.1 mol/L.

The invention has the beneficial effects that: the galvanizing solution provided by the invention is used for galvanizing the metal surface, can obviously inhibit the growth and metabolism of sulfate reducing bacteria, prevents microorganisms from corroding ocean ships and the like, and reduces the ocean transportation cost. The zinc coating can effectively reduce bacteria attached to the surface of the zinc coating, obviously weaken the diffusion impedance of dissolved oxygen on the surface of the zinc coating, and show that the zinc coating has excellent antifouling performance.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Example 1

The galvanizing solution comprises the following components in parts by weight: 40 parts of zinc chloride, 150 parts of potassium chloride, 20 parts of boric acid, 5 parts of leucine, 5 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 15 parts of benzylidene acetone and 1000 parts of water.

The preparation method of the zinc plating solution comprises the steps of dissolving 40 parts of zinc chloride, 150 parts of potassium chloride and 20 parts of boric acid by using 150 parts of water according to parts by weight, and then adding 5 parts of leucine, 5 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 15 parts of benzylidene acetone and 850 parts of water to uniformly mix to obtain the zinc plating solution.

A preparation method of galvanized stainless steel comprises the following steps:

(1) cleaning the surface of stainless steel, drying, placing in the prepared galvanizing solution, electroplating by adopting direct current electrodeposition by taking the stainless steel as a cathode and a zinc plate as an anode to prepare a galvanizing layer; when the direct current deposition is adopted for electroplating, the current density is 10A/dm²The temperature of the galvanizing solution is 40 ℃, and the electroplating time is 40 min;

(2) cleaning the galvanized stainless steel in the step (1) with deionized water, and soaking the stainless steel in a sodium hydroxide solution with the concentration of 2mol/L for 40 s;

(3) and (3) cleaning the stainless steel surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution with the concentration of 0.05mol/L for 12h, taking out, and drying to obtain the galvanized stainless steel.

Example 2

The galvanizing solution comprises the following components in parts by weight: 30 parts of zinc chloride, 100 parts of potassium chloride, 12 parts of boric acid, 3 parts of leucine, 3 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10 parts of saccharin and 800 parts of water.

The preparation method of the galvanizing solution comprises the steps of dissolving 30 parts of zinc chloride, 100 parts of potassium chloride and 12 parts of boric acid by 100 parts of water according to the parts by weight, and then adding 3 parts of leucine, 3 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10 parts of saccharin and 700 parts of water to be uniformly mixed to obtain the galvanizing solution.

A preparation method of a galvanized copper plate comprises the following steps:

(1) cleaning the surface of a copper plate, drying, placing the copper plate in the prepared galvanizing solution, taking the copper plate as a cathode and a zinc plate as an anode, and electroplating by adopting direct current deposition to prepare a galvanizing layer; when the direct current deposition is adopted for electroplating, the current density is 5A/dm²The temperature of the galvanizing solution is 25 ℃, and the electroplating time is 70 min;

(2) cleaning the galvanized copper plate in the step (1) with deionized water, and soaking the copper plate in a sodium hydroxide solution with the concentration of 1mol/L for 30 s;

(3) and (3) cleaning the surface of the copper plate treated in the step (2) with deionized water, drying, soaking in a stearic acid solution with the concentration of 0.02mol/L for 6h, taking out, and drying to obtain the galvanized copper plate.

Example 3

The galvanizing solution comprises the following components in parts by weight: 50 parts of zinc chloride, 200 parts of potassium chloride, 30 parts of boric acid, 8 parts of leucine, 8 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10 parts of sodium benzoate, 10 parts of salicylaldehyde and 1200 parts of water.

According to the preparation method of the zinc plating solution, according to the parts by weight, 50 parts of zinc chloride, 200 parts of potassium chloride and 30 parts of boric acid are firstly dissolved by 200 parts of water, and then 8 parts of leucine, 8 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 10 parts of sodium benzoate, 10 parts of salicylaldehyde and 1000 parts of water are added and uniformly mixed to obtain the zinc plating solution.

A preparation method of a galvanized iron plate comprises the following steps:

(1) cleaning the surface of an iron plate, drying, placing the iron plate in the prepared galvanizing solution, taking the iron plate as a cathode and a zinc plate as an anode, and electroplating by adopting direct current deposition to prepare a galvanizing layer; when the direct current deposition is adopted for electroplating, the current density is 14A/dm²The temperature of the galvanizing solution is 45 ℃, and the electroplating time is 35 min;

(2) cleaning the galvanized iron plate in the step (1) with deionized water, and soaking in a sodium hydroxide solution with the concentration of 3mol/L for 20 s;

(3) and (3) cleaning the iron plate surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution with the concentration of 0.08mol/L for 15h, taking out, and drying to obtain the galvanized iron plate.

Example 4

The galvanizing solution comprises the following components in parts by weight: 40 parts of zinc chloride, 150 parts of potassium chloride, 20 parts of boric acid, 10 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 15 parts of benzylidene acetone and 1000 parts of water.

The preparation method of the galvanizing solution comprises the steps of dissolving 40 parts of zinc chloride, 150 parts of potassium chloride and 20 parts of boric acid by 150 parts of water according to parts by weight, and then adding 10 parts of 3- (4-tert-butylphenyl) -2-isobutyraldehyde, 15 parts of benzylidene acetone and 850 parts of water to mix uniformly to obtain the galvanizing solution.

A preparation method of galvanized stainless steel comprises the following steps:

(1) cleaning the surface of stainless steel, drying, placing in the prepared galvanizing solution, electroplating by adopting direct current electrodeposition by taking the stainless steel as a cathode and a zinc plate as an anode to prepare a galvanizing layer; when the direct current deposition is adopted for electroplating, the current density is 10A/dm²The temperature of the galvanizing solution is 40 ℃, and the electroplating time is 40 min;

(2) cleaning the galvanized stainless steel in the step (1) with deionized water, and soaking the stainless steel in a sodium hydroxide solution with the concentration of 2mol/L for 40 s;

(3) and (3) cleaning the stainless steel surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution with the concentration of 0.05mol/L for 12h, taking out, and drying to obtain the galvanized stainless steel.

Example 5

The galvanizing solution comprises the following components in parts by weight: 40 parts of zinc chloride, 150 parts of potassium chloride, 20 parts of boric acid, 10 parts of leucine, 15 parts of benzalacetone and 1000 parts of water.

The preparation method of the zinc plating solution comprises the steps of dissolving 40 parts of zinc chloride, 150 parts of potassium chloride and 20 parts of boric acid by using 150 parts of water according to parts by weight, and then adding 10 parts of leucine, 15 parts of benzalacetone and 850 parts of water to mix uniformly to obtain the zinc plating solution.

A preparation method of galvanized stainless steel comprises the following steps:

(1) cleaning the surface of stainless steel, drying, placing in the prepared galvanizing solution, electroplating by adopting direct current electrodeposition by taking the stainless steel as a cathode and a zinc plate as an anode to prepare a galvanizing layer; when the direct current deposition is adopted for electroplating, the current density is 10A/dm²The temperature of the galvanizing solution is 40 ℃, and the electroplating time is 40 min;

(2) cleaning the galvanized stainless steel in the step (1) with deionized water, and soaking the stainless steel in a sodium hydroxide solution with the concentration of 2mol/L for 40 s;

(3) and (3) cleaning the stainless steel surface treated in the step (2) with deionized water, drying, soaking in a stearic acid solution with the concentration of 0.05mol/L for 12h, taking out, and drying to obtain the galvanized stainless steel.

Experimental example:

sulfate reducing bacteria (Desulfovibrio caledoniensis) used in the experiment are isolated and cultured by the inventor and are taken from a two-year-old rust layer of the great coast Q235 carbon steel. The strain is subjected to anaerobic enrichment culture by using a sulfate reducing bacteria culture medium C, and the culture temperature is 30 ℃. The sulfate reducing bacteria experiments are all operated in a super clean bench, and are sterilized by ultraviolet irradiation for 30min before the experiments; all culture media and containers are sterilized in autoclave at 121 deg.C for 30min before microbial experiment, to prevent contamination of mixed bacteria.

The coated test pieces prepared in examples 1 to 5 were exposed to the bacterial solution using 5% volume of the bacterial solution of sulfate-reducing bacteria inoculated and cultured for 2 days as an experimental medium, each of three parallel samples was cultured at 30 ℃ for 6 days, and the bacterial concentration in the bacterial solution was measured daily (control was an unplated stainless steel plate). The test results are shown in table 1:

TABLE 1

Note: represents P <0.05 compared to control group; # represents P <0.05 compared to example 1.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.