Electrolytic plating assisting method for hot dip galvanizing of steel wire and electrolytic plating assistant

Abstract

The invention relates to electrolytic plating assistant for hot dip galvanizing of a steel wire. Electrolytic plating assistant comprises the following components: 30-220 g / L of zinc chloride, 0-150 g / L of potassium chloride, 0-150 g / L of sodium chloride, 2-90 g / L of ammonium chloride, 0-100 g / L of boric acid, 0-70 g / L of acetic acid, 1-25 g / L of sodium fluoride, 2-50 g / L of cerium chloride, 0-50 g / L of potassium fluozirconate, 0-50 g / L of methanol, 0.5-20 g / L of hydrogen peroxide and the balance of water. The electrolytic plating assisting method comprises the following steps: washing with alkali, removing oil, washing with water, washing with acid to remove rust, washing with water, activating with weak acid, electrolyzing to assist plating, drying, and purifying the electrolytic plating assistant. The method can reduce the generation of AlCl3, prevent skip plating and reduce the generation of smoke dust. The electrolytic plating assistant has the characteristic of relatively high melting point, and thus, can increase the drying temperature and shorten the drying time. The dried plating assistant has the characteristics of low brittleness, high compatibility with electrogalvanizing, and low tendency to shedding.

Description

Technical field [0001] The present invention is a metal surface treatment technology field, which involves the electrolytic plating method and electrolytic plating of the hot -dip galvanized steel wire. Background technique [0002] In order to prevent defects such as leakage during thermal plating to prevent steel from oxidation before entering the alloy liquid, effectively protection must be performed before its immersion alloy liquid.The method of industrial heat-plated high aluminum Zn-Al base plating layer is: hydrogen restoration method, dual-plating method, electrolytic plating method, etc. [0003] When hot-plating or low aluminum Zn-Al alloys, use traditional zinc chloride and ammonium chloride as a plating agent to obtain a flat and smooth and uniform coating, but the hot-soaking high aluminum Zn-Al alloy or Zn-AL base can be obtained.Due to the CL in the plating agent during multiple alloys - AL reaction in the alloy solution generates AlCl 3 AlCl 3 Fierce volatilizati...

AI Technical Summary

Problems solved by technology

[0003] When hot-dip pure zinc or low-aluminum Zn-Al alloy, using traditional zinc chloride and ammonium chloride as plating flux can get a smooth and uniform coating, but hot-dip high-aluminum Zn-Al alloy or Zn-Al based In multi-component alloys, due to the Cl in the flux - React with Al in the alloy liquid to form AlCl 3 , AlCl 3 Vigorous volatilization will cause missing plating, and in severe cases, the coating will fall off in a large area, or zinc cannot be coated at all.

Images