What causes chrome plating to have chrome spots? How to solve it?
Release Time:
Jul 09,2016
Analysis of chrome spot faults:
The self-purification ability of chrome solution is relatively strong, and there are lead chromate precipitates present in the chrome solution itself. During the electroplating process, due to the rotation of the plate roller, it generally does not adhere to the plate surface. However, if colloidal substances or components that can form colloidal substances with the chrome solution adhere to the plate surface, chrome spots are likely to occur.
Rectification measures for chrome spots:
a. After cleaning the plate roller, the degreaser must be rinsed thoroughly. The degreaser is strongly alkaline, and alkaline substances can form colloidal basic chromium compounds with the chrome solution, which can easily lead to chrome spots or defects in the slow plating speed on the chrome layer.
b. Poor on-site hygiene, dust pollution, or the presence of viscous suspended substances in the plating solution;
c. There are alkaline stripping tanks or alkaline degreasing tanks on the production line. The powder from the dried alkaline solution is very light and can float into the cleaned plate surface, which will definitely form chrome spots;
d. The copper surface sandpaper is too coarse after repair, creating conditions for chrome spot formation;
e. Copper shavings are refilled into the mesh points or pressed onto the plate surface by the scraper, forming chrome spots;
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