Nickel phosphorus ally electroplating liquid and electroplating process thereof

Abstract

The invention relates to the field of electroplating, in particular to nickel phosphorus ally electroplating liquid. The nickel phosphorus ally electroplating liquid comprises the following raw materials: 380-475 g / L of nickel sulfate, 400 ml / L of cylinder opening agent A, 100 ml / L of cylinder opening agent B, 10 ml / L of brightening agent, and the balance of de-ionized water. A nickel phosphorus ally electroplating process comprises the steps of bath building, deoiling, acid activation, liquid plating, dehydration and drying; the overall process is stable in operation and high in plated layerstability; the nickel phosphorus ally electroplating liquid contains no chlorine to improve the pH value stability; the hardness of formed plated layers is 550-600 HV 0.05; the wear resisting index is2 mg / 1000 t; the wear resistance is excellent; the brightening agents are used for improving the deep plating capacity and the brightening capacity of the plating liquid; and when shorted, holes anddumb plated layers are generated in low levels, so that the service life is further prolonged.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a nickel-phosphorus alloy electroplating solution and an electroplating process thereof. Background technique [0002] In the chemical industry, due to production requirements, chemical equipment will inevitably have corrosion problems. In addition to economic losses such as replacement of equipment, equipment shutdown, and product loss, the more serious is due to equipment damage. , Explosions that endanger personal safety, and environmental pollution and resource waste caused by leakage of raw materials and products. [0003] The equipment anti-corrosion technologies currently referred to include reasonable material selection, surface protection (including metal plating and non-gold coating), and environmental medium treatment. Electrochemical protection and anti-corrosion treatment design, etc. [0004] Through these methods, the corrosion problem in chemical equipment has been...

AI Technical Summary

Problems solved by technology

Although Hastelloy and duplex stainless steel have good corrosion resistance to chloride ions, they are extremely expensive and difficult to promote on a large scale. Generally, stainless steel often has little effect in solving this problem.

[0005] Nickel-phosphorus alloy coating is one of the better ways to solve this problem. It has the characteristics of anti-reductive corrosion medium. Common nickel-phosphorus alloy plating methods include electroless plating and constant current electroplating. Electroless plating is due to the Poor stability, short service life, slow deposition rate and other shortcomings cannot be used for equipment with high corrosion resistance requirements

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