Bronze plating additive, method for making same and use in bronze plating on tread band steel wire

Abstract

The invention relates to a chemical displacement bronze plating technique, concrete a bronze plating additive and its preparing method and application in plating bronze on rim steel wire. The additive uses tetrabenzyl porphyrin, 3, 4', 4', 4''-copper tetra sulfophthalocyanine tetrasodium and mulberry skin element to compose the first component, uses sodium dithio propyl sulfonate, 2-benzimidazle, dihydroxylmethyl thiourea, 1, 1'-quintic methyl di(1-mythyl)pyrrolidine tartaric acid to compose the second component, and using polyglycol 6000, sodium dodecyl benzene sulfonate, alkyl polyoxyethylene ether sulfated ester and cobalt bichloride to compose the third component; the ratio of the first component to the second component to the third component = 1 : 50-400 : 70-450 (w / w). The method is simple. The working temperature of the additive is 20-35 deg.C, it does not produce acid mist, the plating solution has above 3 month long stable period and after plated with bronze, the steel wire does not need anticorrosive processing and the anticorrosive period can reach above half a year. The additive can also be applied to plating bronze on the iron-based sheet material.

Description

1. Technical field [0001] The invention relates to a technology of chemical substitution bronze plating, specifically belongs to a bronze plating additive, a preparation method thereof and an application in bronze plating of steel materials, especially an application in bronze plating of bead steel wires. 2. Background technology [0002] The bead wire is the frame material of the tire. The stronger the bond between the bead wire and the rubber, the better the quality of the tire. Industrial practice has proved that the bonding force between the bronze-plated bead wire and rubber is stronger than that of the copper-plated bead wire. The international standard for bead wire (ISO / TC17 / SC17) stipulates that there are only three coatings on the surface of bead wire: brass, bronze 1 (low tin) and bronze 2 (high tin). Brass-plated bead wire is only used in special performance tires, and ordinary tires use bronze-plated bead wire. [0003] At present, there are two commonly used...

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Problems solved by technology

Although electrolytic bronze plating is a mature technology, it uses cuprous cyanide as the main salt, which leads to difficulties in environmental protection; and the replacement bronze plating method reported in the literature (Ru Kui, Dou Guangju: Research on the bead wire tinned bronze process: Metal products, vol 28, No, 6, P4-6.2002) for industrial production, it is necessary to further improve the stability of the plating solution, prevent divalent stannous ions from being oxidized to tetravalent tin and precipitate from the plating solution, and strengthen bronze Anti-corrosion ability of coating

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