Acid Potassium Chloride Electroplating Brightener
Brightener The main brightener can produce remarkable brightening and leveling effect. If the content is too high, the coating in the low current density area will become thinner, and the bottom will be exposed after passivation, which will easily lead to increased brittleness of the coating and affect the passivation quality. The content is too low, the coating bright leveling effect is not good. The content in the bath is maintained at 0.8-2ml/L.
Description
Brightener
The main brightener can produce remarkable brightening and leveling effect.
If the content is too high, the coating in the low current density area will become thinner, and the bottom will be exposed after passivation, which will easily lead to increased brittleness of the coating and affect the passivation quality.
The content is too low, the coating bright leveling effect is not good. The content in the bath is maintained at 0.8-2ml/L.
Brightener performance evaluation index
1.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.
2.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.
3.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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