Copper piece surface passivating treatment fluid
A technology of passivation treatment and copper parts, which is applied in the field of copper parts surface, can solve the problems of poor heat and humidity resistance of passivation treatment liquid, affect the health of operators, and complex components of passivation liquid, so as to improve the heat and humidity resistance, Improved passivation effect and slow film formation
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Embodiment 1
[0011] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.41ml / L, and the polyvinyl alcohol is 2.59ml / L.
Embodiment 2
[0013] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.88ml / L, and the polyvinyl alcohol is 2.12ml / L.
Embodiment 3
[0015] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.67ml / L, and the polyvinyl alcohol is 2.33ml / L.
[0016] The following table 1 is the mass ratio of each raw material in the wetting agent in Examples 1 to 3:
[0017] Table 1 The mass ratio of each raw material in the wetting agent in Examples 1-3
[0018] D Example 1 Example 2 Example 3 polyethylene glycol 1.7 2.3 2 polyvinyl alcohol 1 1 1
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