Environment-friendly high-phosphorus chemical nickel additive

Abstract

The invention discloses an environment-friendly high-phosphorus chemical nickel additive which consists of component A and a component B. The component A comprises the following raw materials based on concentration: 2-5mg / L soluble copper salt, 2-4mg / L cerous sulfate, 1-4mg / L ammonium molybdate and 11-23g / L complexing agent. The component B comprises the following raw materials based on concentration: 1-4mg / L PAP (propargyl alcohol propoxy compound), 1-3mg / L DEP (N, N-diethyl-propyne ammonium), 1-4mg / L PPS (pyridinium-1-pmpane-3-sulfonate) and 2-4mg / L BTA (benzotriazole). The formula of the environment-friendly high-phosphorus chemical nickel additive provided by the invention does not contain lead, cadmium and other heavy metal ions, thus the additive is non-toxic, harmless and environment-friendly. The additive is applied to a chemical nickel plating liquid to enable the plating liquid to be stable, thus the obtained plating is dense, has low porosity and good nitric acid resistance, and can achieve the effect that the nickel plating does not change color after being immersed in concentrated nitric acid for 5 minutes.

Description

technical field [0001] The invention relates to an environment-friendly high phosphorus chemical nickel additive. Background technique [0002] Due to the good corrosion resistance of high phosphorus chemical nickel, it is widely used in oil field equipment, electronic equipment, and automobile industry. However, traditional chemical nickel process stabilizers contain lead ions etc. and brighteners contain cadmium compounds. These harmful heavy metals in traditional electroless nickel plating wastewater are extremely difficult to treat because of their small amount. When improperly treated and accumulated in the environment, they will cause serious pollution to the local environment. Due to the nature of the heavy metals themselves, the This kind of pollution has a long-term impact, and the pollution and damage caused to the environment and human beings are catastrophic. [0003] The addition of stabilizers in the chemical nickel plating solution can not only prevent or d...

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Problems solved by technology

However, the traditional chemical nickel process stabilizer contains lead ions, etc. and the brightener contains cadmium compounds

These harmful heavy metals in traditional electroless nickel plating wastewater are extremely difficult to treat because of their small amount. When improperly treated and accumulated in the environment, they will cause serious pollution to the local environment. Due to the nature of the heavy metals themselves, the This kind of pollution has a long-term impact, and the pollution and damage to the environment and humans are catastrophic.

[0003] The addition of stabilizers in the electroless nickel plating solution can not only prevent or delay the spontaneous decomposition of the electroless nickel plating solution, stabilize the plating solution, and sometimes accelerate The reaction affects the phosphorus content and internal stress of the electroless nickel coating. Therefore, for a mature chemical nickel product, stabilizers are essential, but traditional stabilizers are mostly heavy metals such as lead ions, which are inevitable in the electroless nickel coating. Contains lead and other heavy metals that are harmful to the environment and human body

In recent years, people have higher and higher requirements for the brightness of chemical nickel. In order to obtain a beautiful coating, it is proposed to add a brightener to the chemical nickel plating solution. The traditional CdSO4 as a brightener has a good brightening effect, but due to the plating solution Cd in Cd will co-deposit with Ni-P alloy, which will cause great harm to the environment and human body. Therefore, it is expected to develop a new additive that can meet the requirements of stability and brightness and is non-toxic and harmless to the environment. environmentally friendly

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