Acid Potassium Chloride Zinc Electroplating Softener
USE: 1. Metal surface treatment electro-galvanized 2. Galvanized standard parts, such as screw, nuts, and bolts 3. Metal accessories and metal fittings need to be galvanized 4. Electric galvanizing parts color has silver white, blue white, and color
Description
Acid potassium chloride zinc electroplating softener
Packing specifications: 25kg/plastic drum
200kg/plastic drum
1000kg/plastic drum on metal pallet
Payment: T/T or L/C
Delivery Port: Tianjin or Qingdao
Test Institution: SGS or CCIC
Capacity: 1000 MT per month
Period of Validity: 7 days
USE: 1. Metal surface treatment electro-galvanized
2. Galvanized standard parts, such as screw, nuts, and bolts
3. Metal accessories and metal fittings need to be galvanized
4. Electric galvanizing parts color has silver white, blue white, and color
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 |
Bath formula and technological parameters
|
|
concentration range |
Standard concentration |
|
KCl |
200-230 g/L |
220g/L |
|
ZnCl |
60-100 g/L |
60g/L (barrel) |
|
Boric Acid |
30-40 g/L |
35 g/L |
|
HL-93 Softening Agent |
20-30 g/L |
25 g/L |
|
HL-93 Brightening Agent |
0.6 ml/L- 1.0 ml/L |
0.8ml/L |
|
Temperature (℃) |
10-55℃ |
40℃ |
|
PH value |
4.8-5.6 |
5.2 |
|
DK (A/dm2) |
0.1-5 |
3 |
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