How to judge whether the precipitation of zinc liquid and the precipitation of impurities have had an adverse effect on the quality of zinc plating?

Release time:

2024-05-22

Whether the precipitation of zinc liquid and the precipitation of impurities have had an adverse effect on the quality of zinc plating

The following aspects can be used for judgment:

Observe the surface of the zinc plating layer. If there is roughness, obvious graininess, unsmoothness, or abnormal phenomena such as pits and spots, it may be affected by precipitation and impurities.

Check whether the thickness distribution of the zinc plating layer is uniform. If there are local situations of too thick or too thin, it may mean that there is precipitation or impurity interference.

Conduct a adhesion test. For example, in a cross-hatch test, if the coating is easily peeled or flaked, it indicates that there may be quality problems affected by precipitation and impurities.

Through the corrosion resistance test, after placing the plated part in a corrosive environment for a period of time and observing its corrosion situation. If the corrosion rate is relatively fast or there are abnormal corrosion forms, it may be related to precipitation and impurities.

Microstructural analysis of the plated part can also be performed to see if there are abnormal microstructures or defects, so as to infer the influence situation of precipitation and impurities.

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