How to solve the problem of poor corrosion resistance of automobile electrophoretic paint film?

Date:

2020-05-06

As we all know, automobile coating is a very complicated process in the automobile manufacturing process. Its main purpose is to make the coated object achieve a certain degree of decoration, corrosion resistance, and surface protection. However, in the process of electrophoretic coating, sometimes due to various reasons, the problem of poor corrosion resistance of automobile electrophoretic paint film appears. At this time, how to solve the problem of poor corrosion resistance of automobile electrophoretic paint film? First of all, the phenomenon of poor corrosion resistance of automobile electrophoretic paint film should be analyzed, and then according to the causes, targeted to solve the problem. Here are professionals to introduce the causes of poor corrosion resistance of automobile electrophoretic paint film and its prevention and control methods: common causes of poor corrosion resistance of Feiyang automobile electrophoretic paint film: 1. The thickness of the paint film is not enough. 2. The quality of the pre-treatment phosphating film is poor, the phosphating film is too thin, the upper film is incomplete, rust, etc. 3. The curing of the electrophoretic paint film is not complete enough. 4. The content of impurity ions in the paint is too much, resulting in mixing into the car electrophoretic paint film during deposition. Prevention and control methods: 1. Strengthen control to ensure that the thickness of the electrophoretic paint film is within the scope of the index. 2, strengthen the pre-treatment control, to ensure that the phosphating film is uniform, complete and dense. 3, strengthen the barbecue control: time, temperature, and dryness of the inspection, to ensure that the film is fully cured. 4. Strengthen the pre-treatment water washing to ensure the pure water quality and washing effect; Remove impurity ions through cathode diaphragm or discharge ultrafiltrate.

First of all, the phenomenon of poor corrosion resistance of automobile electrophoretic paint film should be analyzed, and then according to the causes, targeted to solve the problem. Here are professionals to introduce the causes of poor corrosion resistance of automotive electrophoretic paint film and its prevention and control methods:

Common causes of poor corrosion resistance of Feiyang automotive electrophoretic paint film:

1. The thickness of the paint film is not enough.

2. The quality of the pre-treatment phosphating film is poor, the phosphating film is too thin, the upper film is incomplete, rust, etc.

3. The curing of the electrophoretic paint film is not complete enough.

4. The content of impurity ions in the paint is too much, resulting in mixing into the car electrophoretic paint film during deposition.

Prevention and control methods:

1. Strengthen control to ensure that the thickness of the electrophoretic paint film is within the scope of the index.

2, strengthen the pre-treatment control, to ensure that the phosphating film is uniform, complete and dense.

3, strengthen the barbecue control: time, temperature, and dryness of the inspection, to ensure that the film is fully cured.

4. Strengthen the pre-treatment water washing to ensure the pure water quality and washing effect; Remove impurity ions through cathode diaphragm or discharge ultrafiltrate.

Global coating demand is expected to reach 54.7 million tons by 2020