Acid Potassium Chloride Zinc Electroplating Brightener
Additive performance evaluation index High turbidity point: additives with high temperature resistance and low turbidity point are easy to precipitate at high temperature at a certain temperature, resulting in large consumption and poor performance.
Description
High salt resistance: the process range can be expanded, which is conducive to the improvement of electroplating performance. Additives with low salinity tolerance are easy to salt-out, poor performance and large consumption.
High brightness: good performance additive leveling good, current distribution uniform ability, plating ability, high brightness, uniform thickness, good depth ability, light speed.
Common failures and processing method
|
Problem Description |
Probable cause |
Solutions |
|
Poor brightness |
Lack of brightener Lack of softener Organic impurity pollution |
Brightener supplement Softener supplement Activated carbon filtration |
|
Poor coverage No coating in hole and concave
|
Lack of brightener Lack of softener Low potassium chloride The bath temperature becomes higher Aluminum impurity pollution |
Brightener supplement Softener supplement Potassium chloride supplement Lowering temperature Treat with zinc powder |
|
The bright range is narrow and the coating is easy to burn |
The PH value of the bath increases Lack of zinc Lack of boric acid Lack of softener |
Adjust PH value with dilute hydrochloric acid Zinc chloride supplement Boric acid supplement Softener supplement |
|
The coating has white mist |
Effect of organic impurities Poor cleaning after plating |
Activated carbon filtration Change the cleaning water |
|
The coating blackening after acid dipping |
Iron impurity Copper impurity |
Hydrogen peroxide treatment and filtration Treat with zinc powder |
|
Roller holes appear in the coating |
Lack of softener Iron impurity Excessive current Lower zinc Over loading of work |
Softener supplement Hydrogen peroxide treatment and filtration Lower total current Zinc chloride supplement Reduced loading |
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