Cyanide-free sulfite system electrogilding solution and application thereof

Abstract

The invention discloses a cyanide-free sulfite system electrogilding solution and application thereof. The cyanide-free sulfite system electrogilding solution comprises the following raw materials: 10 g / L-30 g / L of gold sulfite (in terms of gold element), 50 g / L-250 g / L of alkali metal sulfite, 130 g / L-280 g / L of an auxiliary complexing agent, 50 g / -120 g / L of conductive salt and 0.08 g / L-1 g / L of a composite additive. The composite additive comprises an organic additive and an inorganic additive, the organic additive at least contains an alcohol additive, and the inorganic additive at least contains any one of antimony, cerium, copper, tellurium and bismuth ions. The cyanide-free sulfite system electrogilding solution researched and developed is high in gold content, simple in component, stable in property, wide in pH value range, good in deep plating capacity, relatively high in cathode current density and high in current efficiency, and can be applied to preparation of a thick gold layer.

Description

Technical field

[0001] The present invention relates to the field of electroplating liquid, and more particularly to an electroplating fluid of a cyanisulfanous sulfate system and its application thereof. Background technique

[0002] The metal plated metal plated in the gold plated article enables the gold-plated article with excellent conductivity, thermal conductivity, corrosion resistance, and resistance. Therefore, gold-plated products are widely used in precision instruments, refined processing, defense technology and other industries.

[0003] In the electroplating industry, cyanide plating technology is used early. The hydrothermal plating fluid of the cyanide used is stable, excellent in coverage, detachable crystallization, but cyanide is a highly toxic chemical, which has a huge threat to the health and safety of staff. With the development of society, traditional cyanide electropranched techniques are gradually replaced by safe and non-toxic cyanide electroplating tec...