1. Main parameters of rack plating
| No | Item | Specification |
| 1 | material | steel |
| 2 | product size range | according to customer |
| 3 | coating type | zinc |
| 4 | coating thicknes | <10μm |
| 5 | running rhythm | adjustable |
| 6 | barrel specification | according to product |
2. Technological process of production(Taking barrel zinc plating as an example)
Feeding→Alkaline degreasing→Electrolytic degreasing→Water rinsing→Pickling→Water rinsing→Zinc plating→Water rinsing→Bright dipping→Water rinsing→Passivation→Water rinsing→Hot water rinsing→Drying→Put down
3. Photos of barrel plating machine
4. Solution preparation
Zinc plating solution:
ZnCl2 30-70 g/L
KCl 200-260 g/L
H3BO3 25-35 g/L
Wake up agent 16-25 ml/L
Brightening agent 0-1 m1/L
5. Common faults and solutions
| Fault phenomenon | Possible causes | Solution |
| High brittleness of coating | 1. pH value ≤ 4 or ≥ 6.3 | 1. Adjust to 5.6-5.9 |
| 2. The temperature is too low and the thickness is too thick | 2. Increase temperature and reduce plating thickness |
| 3. Organic or non-metallic impurities pollution | 3. Major processing |
| 4. Excessive main light agent and additives | 4. Reduce pH to 4, electrolysis |
| 5. Excessive Dk and excessive iron impurities | 5. Reduce Dk and remove iron |
| 6. Low boric acid or high zinc and low potassium | 6. Adjust to Range |
| 7. Acid washing hydrogen permeation | 7. Add corrosion inhibitor |
| Small range of bright current | 1. Less softener and less boric acid | 1. Add in place |
| 2. Improper pH value | 2. Adjust to 5.6-5.9 |
| 3. Zinc too high or too low | 3. Adjust to normal |
| 4. Too high or too low Potassium chloride | 4. Adjust to normal |
| 5. High iron impurities | 5. Iron removal |
| 6. Excessive foreign metal impurities | 6. Zinc powder |
| 7. Temperature too high | 7. Reduce temperature |
| Skip plating | 1. High zinc and low potassium | 1. Adjustment |
| 2. Excessive brightener | 2. Electrolysis at low pH |
| 3. Too much loading | 3. Reduction |
| 4. Improper pH value | 4. Adjustment |
| 5. Temperature too high | 5. Cooling |
| 6. Excessive organic and non-metallic impurities | 6. Major processing |
| 7. Nitrate or Hexavalent chromium | 7. See processing method |
| 8. Poor pre-treatment in low areas | 8. Improvement |
| The coating is not bright | 1. Dk is not driving very well | 1. Identify reasons for improvement |
| 2. Excessive organic and non-metallic impurities | 2. Major processing |
| 3. Insufficient or too short anode | 3. Improvement |
| 4. Poor conductivity | 4. Inspection and improvement |
6. Packaging & Shipping
We can pack it by pallet, or according to the customers' specific requirements.
Port: Shanghai/Ningbo
7. Our Services
In order to guarantee the customers are able fully to operate the machine, if the customer need, we can help customer training, includes:
(1) Correct operating mode
(2) Correct maintenance way
(3) Correct technological process control
(4) Remove simple problem
All the electroplating machine of our company have already been widely used in electroplating area.
Any doubt please contact us.
