Electrolyte additive used for electroforming high hardness and low stress nickel workpiece

Abstract

The invention discloses an electrolyte additive used for electroforming a high hardness and low stress nickel workpiece. The additive comprises an organic additive and a rare earth additive and is characterized in that the organic additive comprises 150-200 g / L of sodium saccharin, 30-50 g / L of ethoxylation butynediol, 10-20 g / L of N,N-diethyl-2-propyneammonium sulfate, 80-120 g / L of PPSOH, 1-2 g / L of S-carboxyethylisothiuronium chloride and 8-10 g / L of sodium vinylsulfonate; and the rare earth additive comprises 0.4-0.8 g / L of lanthanum chloride (LaCl3.7H2O) and 0.2-0.4 g / L of cerium chloride (CeCl3.7H2O). By means of the electrolyte additive, the process effects of a bright and smooth surface, high hardness, low inner stress and the like can be achieved, an electrolyte is easy to maintain, the adding amount and the consumption amount are small, and the electrolyte additive can be used for a nickel aminosulfonate electrolyte system and a nickel sulfate electrolyte system.

Description

technical field [0001] The invention relates to the technical field of electroforming, in particular to an electrolyte additive for electroforming high-hardness and low-stress nickel parts. Background technique [0002] Nickel is one of the most commonly used electroforming metals. At present, in industrial production, the electroforming of nickel is mostly carried out based on nickel sulfate electrolyte system and nickel sulfamate electrolyte system. The surface morphology, smoothness, mechanical and physical and chemical properties of electroformed nickel parts are not only related to the basic bath composition, additive composition and addition amount, but also related to operating parameters such as temperature, stirring method and intensity, current density and other factors. related. Among them, the morphology and performance of electroformed nickel parts are most sensitive to the additive composition and amount added in the electrolyte system. Moreover, in many cas...

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Problems solved by technology

However, nickel electroformed parts based on the above additives often have disadvantages such as low hardness, high stress, easy deformation, and rough surface (requires secondary processing), which are far from meeting the application requirements of modern nickel electroforming production.

Moreover, the consumption of the above-mentioned additives is large and there are many decomposition products, which lead to problems such as extremely difficult maintenance of the electrolyte, short service life, and poor product performance.

Although there are also some combined nickel electroforming additives with multiple components on the market, they all have various deficiencies, and the comprehensive performance and practicability are not high.