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LH-663 trivalent black blunt
2022-09-09 673
1、 Operating conditions
LH-663：200ml/l
Temperature: 30 ℃
PH：1.8
2、 Product characteristics
The passivation layer is dark and uniform, and the black zinc can reach 72 hours neutral salt spray after passivation and sealing. Only applicable to zinc acid.
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