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Antibacterial application of copper sulfate in automobile painting cathode electrophoretic paint

A cathodic electrophoresis and copper sulfate technology, applied in the direction of electrophoretic plating, coating, electrolytic coating, etc., can solve the problems of poor sterilization effect, difficult maintenance, high use concentration, etc.

Inactive Publication Date: 2018-12-07
齐昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned hydrogen peroxide sterilization has the disadvantages of strong corrosion, easy decomposition, and high use concentration during use; the problem of high unit price and difficult storage of kathone agent; the problems of high unit price, difficult maintenance, and poor sterilization effect of ultraviolet lamp equipment

Method used

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  • Antibacterial application of copper sulfate in automobile painting cathode electrophoretic paint
  • Antibacterial application of copper sulfate in automobile painting cathode electrophoretic paint
  • Antibacterial application of copper sulfate in automobile painting cathode electrophoretic paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Weigh CuSO with an analytical balance in a 250ml beaker 4 ·5H 2 O 0.1921g was dissolved in pure water to 100g to obtain a copper sulfate solution, and the pure water tank liquid containing bacteria was added to 11 beakers with 200g per part, numbered respectively from No. 1 to No. 11, and the above-mentioned copper sulfate was added to No. 1 to No. 11 beakers respectively Solution 0, 0.16g, 0.28g, 0.40g, 0.52g, 0.76g, 1.00g, 1.20g, 1.40g, 1.60g, 1.80g; then add 1.80g of pure water weighed into beakers 1 to 11, 1.64g, 1.52g, 1.40g, 1.28g, 1.04g, 0.80g, 0.40g, 0.20g, 0g; after shaking well, let it stand for four hours, and then carry out bacterial detection according to the detection method of Shumei bacteria detection sheet. The test results are shown in Table 3.

[0133] The test result of table 3 embodiment 1

[0134]

[0135] It can be seen from Table 3 that Cu at a certain concentration between 1.9 and 2.5 mg / kg 2+ For bacteria content 10 7 cfu / ml of pure wat...

Embodiment 2

[0137] Weigh CuSO with an analytical balance in a 250ml beaker 4 ·5H 2 O 0.1921g is dissolved in pure water to 100g to obtain a copper sulfate solution, take 200g of the pure water bath solution containing bacteria and add it to a beaker, add 1.60g of the above-mentioned copper sulfate solution weighed, shake it and place it for 0, 60min, 120min, 240min, 480min The samples were tested for bacteria according to the test method of Shumei bacteria test strips.

[0138] The test result of table 4 embodiment 2

[0139]

[0140] As can be seen from Table 4, Cu at a concentration of 4.0 mg / kg 2+ For bacteria content 10 7 Cfu / ml of pure water tank washing liquid can be sterilized after 120min.

Embodiment 3

[0142] Weigh CuSO with an analytical balance in a 250ml beaker 4 ·5H 2 O 0.1921g is dissolved in pure water to 100g to obtain copper sulfate solution, and the pure water tank solution containing bacteria is added to two beakers with every part of 200g, and 1.52g pure water taken by weighing is added in one beaker, and 1.52g pure water taken by weighing in the other beaker is added. g above-mentioned copper sulfate solution. Stir well to measure the conductivity and pH value of No. 1 and No. 2 samples respectively.

[0143] The test result of table 5 embodiment 3

[0144]

[0145] As can be seen from Table 5, Cu at a concentration of 4.0 mg / kg 2+ It will reduce the pH of the bath solution by 0.2 and increase the conductivity by 16.2μs / cm.

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Abstract

The invention discloses antibacterial application of copper sulfate in automobile painting cathode electrophoretic paint. A copper sulfate solution is adopted for carrying antibacterial treatment on pure water bath liquid and electrophoresis tank liquid in an automobile painting cathode electrophoretic paint technology. The antibacterial application of the automobile painting cathode electrophoretic paint is very simple in application technology, wherein a certain quantity of copper sulfate solution is added into the pure water bath liquid and the electrophoresis tank liquid in the automobilepainting cathode electrophoretic paint technology for carrying out antibacterial treatment, and a very good antibacterial effect can be achieved; more importantly, after the copper sulfate is added for carrying out antibacterial treatment, influence caused to all performance indexes such as electrophoresis tank liquid parameters, construction performance and coating performance is very small; andmeanwhile, because copper sulfate is low in unit price and dosage, the cost of treatment is remarkably reduced.

Description

technical field [0001] The invention relates to the application of copper sulfate, in particular to the antibacterial application of copper sulfate in cathodic electrophoretic paint for automobile coating. Background technique [0002] The process flow of electrophoretic paint for automobile pretreatment is as follows: body-in-white is washed with hot water, pre-degreased, degreased, industrial water washed, surface adjustment, phosphating, industrial water washed, pure water washed, electrophoresis, ultrafiltration cleaning, pure water cleaning, draining, and baking . The electrophoresis system includes an anode system and an ultrafiltration system. [0003] The main process tanks for bacterial growth are pure water washing tanks, ultrafiltration cleaning tanks, anode tanks and electrophoresis tanks. The reason is that the small amount of organic resin brought into the tank by cleaning and the weak acidic conditions are very suitable for bacterial growth; the second paint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/22C25D13/20
Inventor 齐昊
Owner 齐昊
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