Novel galvanizing and chrome-free passivating technology
A new technology, the technology of galvanized layer, applied in the new field of galvanized chromium-free purification, can solve the problems of non-conductivity, poor weather resistance, unsatisfactory corrosion resistance effect, etc., and achieve the effect of eliminating pollution problems.
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Embodiment 1
[0014] A new technology for chromium-free purification of galvanized, using a passivation solution with a pH of 2.5, at a temperature of 35°C, to passivate the galvanized layer for 45-90s, and a blue passivation film can be obtained, the film color is uniform, and the passivation film is stable. Corrosion resistance increases with the increase of passivation solution temperature 50℃ and treatment time 300s.
Embodiment 2
[0016] A new technology for chromium-free purification of galvanized, using a passivation solution with a pH of 2.7, at a temperature of 36°C, to passivate the galvanized layer for 75s, and a blue passivation film can be obtained, with uniform color and corrosion resistance of the passivation film With the passivation solution temperature 48 ℃ and treatment time 210s increase.
Embodiment 3
[0018] A new technology for chromium-free purification of galvanized, using a passivation solution pH 3.0, at a temperature of 40 ℃, passivating the galvanized layer for 85s, and then a blue passivation film can be obtained, the color of the film is uniform, and the corrosion resistance of the passivation film is excellent. With the passivation solution temperature 49 and treatment time 300s increased.
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