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    Home > Coatings News > Paints and Coatings Market > What is the reason why the results of the salt spray test of electrophoresis paint film are not qualified?

    What is the reason why the results of the salt spray test of electrophoresis paint film are not qualified?

    • Last Update: 2020-12-03
    • Source: Internet
    • Author: User
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    Electrophoresis coating has been widely used in automobiles, motorcycles, bicycles, home appliances because of its safety and environmental protection, excellent quality control, high efficiency of operation and production... and so on all walks of life. The most basic purpose of coating is anti-corrosion, but sometimes it is also found that the finished electrophoresis of the salt spray test results are not ideal, why? Explain the reasons and prevention methods for everyone now.
    common causes of poor salt spray testing in finished electrophoresis products: poor pre-treatment of
    (
    1
    ), corrosion of work parts before electrophoresis has produced .
    (
    2
    ) electrophoretic tank liquid too many impurity ions, deposition mixed into the electrophoretic paint film.
    (
    3
    ) electrophoresis paint film thickness is thin.
    (
    4
    ) after electrophoresis water washing salt more.
    (
    5
    ) electrophoresis paint film is not cured completely.
    control methods:
    (
    1
    ) strictly in accordance with the requirements of pre-treatment control, to ensure the quality of phosphate film.
    (
    2
    ) reduces the concentration of impurity ions in the electrophoresis tank by controlling the conductivity of the fluid in the tank.
    (
    3
    ) strictly in accordance with the requirements of the process, to ensure that the thickness of electrophoresis paint film up to the target requirements.
    (
    4
    ) is rinsed with pure water, and the conductivity of the water is controlled
    below 50um/cm
    cm.
    (
    5
    ) classify electrical swimming for work items of different thicknesses, strictly control baking time and temperature, and ensure that the coating film is fully cured.
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