Zinc and zinc alloy plating black passivation solution and preparation method thereof
A technology of zinc alloy and passivation solution, which is applied in the coating process of metal materials, etc., can solve the problems of uneven passivation layer, easy peeling off, uneven black film, etc., achieve high market competitiveness, development potential, and easy operation Easy to learn, good corrosion resistance
Inactive Publication Date: 2011-04-13
济南德锡科技有限公司
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The invention discloses zinc and zinc alloy plating black passivation solution and preparation method thereof. The passivation solution consists of 5 to 50g/L of trivalent chromic salt, 1 to 10g/L of auxiliary film forming agent, 0.2 to 10g/L of reducing agent, 2 to 15g/L of pH buffer agent, 1 to 50g/L of chelating agent, 0.5 to 10g/L of blackening agent, 1 to 50g/L of oxidant and 0 to 50g/L of pH regulator. The passivation solution has stable working solution performance and low cost, and is simple and convenient to operate and easy to learn; zinc and zinc alloy plated parts passivated by the working solution are black and bright, uniform in color and good in corrosion resistance, reach level 8 in 72 hours, and have good bonding force; and the plating solution and coatings totally contain no Cr(VI), and the Cr(VI) cannot be detected from workpieces placed for a long term, so the passivation solution has high market competitiveness and development potential.
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Property | Measurement | Unit |
Thickness | 8.0 | µm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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