Acid zinc-nickel alloy electroplating additive and electroplating solution

Abstract

The invention relates to an acidic zinc-nickel alloy electroplating additive and electroplating liquid, and belongs to the technical field of electroplating. The acidic zinc-nickel alloy electroplating additive comprises 30-65 g / L of a brightening agent, 20-45 g / L of a coordination agent and 140-165 mL / L of a surface wetting agent according to the concentration in an electroplating solution, the brightening agent is prepared from 4 phenyl-3-butene-2-ketone, butynediol and o-phenylmethyl sulfimide, and the brightening agent is prepared from 4 phenyl-3-butene-2-ketone, butynediol and o-phenylmethyl sulfimide; the coordination agent is prepared from sodium salicylate, triethanolamine and sodium benzoate; the surface wetting agent is prepared from polyethylene polyamine, sodium ethanesulfonate and polyethylene glycol. The electroplating additive is suitable for an acidic zinc-nickel alloy plating seed, the purpose of crystal refinement of a plating layer is achieved through the coordination effect of the brightening agent, the coordination agent and the surface wetting agent, the leveling capacity and glossiness of the plating layer are effectively improved, the appearance of the plating layer is remarkably improved, and the plating layer has better flatness and glossiness; and plating can be performed at room temperature, the plating time is short, energy can be effectively saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an acid zinc-nickel alloy electroplating additive and an electroplating solution. Background technique [0002] The progress of modern industry and science and technology has strongly promoted the rapid development of my country's real estate industry, military industry, infrastructure and other industries. With the continuous improvement of metal surface protection performance requirements, zinc-nickel alloy coatings have been widely used in many fields because of their excellent corrosion resistance, low hydrogen embrittlement and excellent decorative properties. Zinc-nickel alloy electroplating is divided into two systems: alkaline and acid. Alkaline zinc-nickel alloy electroplating system, but the alkaline process system has always existed problems such as low current efficiency, poor plating ability of the plating solution, high plating temperature, and long time. It...

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Problems solved by technology

Zinc-nickel alloy electroplating is divided into two systems: alkaline and acidic. Alkaline zinc-nickel alloy electroplating system, but the alkaline process system has always had problems such as low current efficiency, poor plating ability of the plating solution, high plating temperature, and long time. It has not been well solved; the current mainstream in the market is the acidic zinc-nickel electroplating system, which has the advantages of high current efficiency, good corrosion resistance of the coating, and easy operation at room temperature, but it is difficult to obtain the appearance without the coordination of additives. Flat, glossy zinc-nickel coating, so it is of great significance to develop zinc-nickel electroplating additives that can effectively improve the flatness and gloss of the coating

[0003] Patent CN 109609979 A proposes a multi-layer nickel electroplating additive to improve stability: its current density range is as high as 16-19mA / cm 2 , the plating temperature ranges from 50 to 60°C, and the plating time is 28 to 35 minutes. This plating condition significantly increases energy consumption and production costs in production, and at the same time, the production efficiency is also low.

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