Rare earth-containing Cu-Zn-Co steel cord coating and preparation method thereof

Abstract

The invention discloses a rare earth-containing Cu-Zn-Co steel cord coating and a preparation method thereof. The preparation method specifically comprises the following steps: step 1, paying off a smooth steel wire; 2, pickling the steel wire with diluted hydrochloric acid, wherein the concentration of the hydrochloric acid is 150 + / -50g / L; thirdly, the steel wire treated in the second step is washed and dried; fourthly, the steel wire treated in the third step is subjected to copper electroplating through a copper plating tank and cobalt electroplating through a cobalt plating tank, and a plating solution contains a rare earth additive; fifthly, Zn powder is sprayed on the surface of the steel wire obtained in the fourth step through a plasma spray gun; sixthly, the steel wire obtained in the fifth step passes through an intermediate frequency furnace, so that coating metal is diffused, and the steel wire containing the rare earth Cu-Zn-Co coating is obtained; according to the rare earth-containing Cu-Zn-Co steel cord coating and the preparation method thereof, rare earth is added, the coating structure is refined, the initial bonding performance of the coating and rubber is improved, meanwhile, the coating can have more excellent damp-heat aging bonding performance, the use of Co elements in rubber products can be reduced, rubber cracking and aging are retarded, and the durability of rubber is improved.

Description

technical field [0001] The invention belongs to the technical field of metal product coating, in particular to a rare earth-containing Cu-Zn-Co steel cord coating and a preparation method thereof. Background technique [0002] Elongated steel elements such as brass-coated steel wires and steel cords are widely used to enhance the bond of rubber products such as tires. Cobalt complexes are added to the rubber compound in order to have good adhesion formation and reduce the rate of adhesion deterioration, especially due to aging under hot and humid conditions. However, cobalt is considered a detrimental substance to rubber because, like most transition metals, cobalt is an oxidation catalyst. As a result, the oxidation of diene-based rubber molecules is accelerated, which leads to early rubber aging, increasing tire service performance by increasing the cobalt content of the steel cord coating. [0003] However, the existing Cu-Zn-Co coated steel cord has better aging adhesi...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of rare earth-containing Cu-Zn-Co steel cord coating and preparation method thereof, to solve the existing Cu-Zn-Co coated steel cord proposed in the above-mentioned background technology, and Cu-Zn coating Poor initial adhesion to rubber compared to steel cords