High-technology Enterprise、SRDI Enterprise
current location：home > Fault handling重庆立道新材料科技有限公司 2026-06-03 14:58:04 阅览13
| Fault Phenomenon | Possible Causes | Corrective Actions |
|---|---|---|
| Rough, dull coating and turbid plating solution | (1) Excessively high current density (2) Over-high pH value (3) Insufficient buffer agent (4) Inadequate brightener | (1) Reduce current density (2) Lower pH value (3) Replenish buffer agent per bath analysis (4) Add brightener |
| Low deposition rate | (1) Low zinc content in bat h(2) Low pH value (3) Insufficient conductive salt (4) Low current density | (1) Add more zinc anodes (2) Raise pH value (3) Supplement conductive salt (4) Increase current density |
| Grey spots on coating, more prominent in low-current-density areas | (1) Low current density (2) Insufficient brightener (3) Over-high pH value (4) Excessive metallic impurities | (1) Raise current density (2) Top up brightener (3) Decrease pH value (4) Purify bath via zinc dust treatment or low-current electrolysis |
| Coating prone to burning; unable to raise current density | (1) Low zinc concentration (2) Over-high pH value (3) Insufficient conductive salt (4) Lack of brightener | (1) Replenish zinc based on bath analysis (2) Reduce pH value (3) Supplement conductive salt per analysis (4) Add brightener |
| White powdery residue on parts after drying | Inadequate post-plating rinsing | Strengthen post-plating cleaning process |
