Aqueous fusion agent used for flux method hot dip coating low aluminium zinc alloy and its application method
A technology of hot-dip plating and fluxing agent, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of weakening the effect of flux, missing plating of steel products, heavy environmental pollution, etc., and achieve improved wettability Ability, low surface tension, good dissolution effect
Inactive Publication Date: 2005-01-26
UNIV OF SCI & TECH BEIJING
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[0026] After fully degreasing, pickling and water washing, the No. 20 carbon steel sample of 50mm×30mm×20mm is immersed in the water flux listed in Table 1 for 30s~50s, taken out and dried, and then immersed in 425℃~430℃ The molten Zn-5%Al-RE or Zn-3.5%Al-RE alloy plating solution is hot-dipped, and the obtained plated sample surface is bright and smooth, without black spots and missing plating defects.
[0027] Table 1 Flux Composition * (parts by mass%)
[0028] Example
[0029] * Each proportioning composition is based on a solid total amount of 300 grams per liter.
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An aqueous flux for hot dip coating of low-Al Zn alloy by flux method is prepared from zinc chloride (70-80 mass%), ammonium chloride (8-10 mass%) and cerium chloride (4-10 mass%). Said hot dip coating process includes such steps as removing oil and rust from the iron or steel workpiece, immersing it in said aqueous flux for a certain time, baking at 120-160 deg.c, and immersing in molten Zn-Al alloy.
Description
technical field [0001] The invention belongs to the technical field of hot-dip galvanized aluminum for iron and steel products, and in particular provides a flux method for hot-dip galvanizing of low-aluminum-zinc alloys by solvent method, which is suitable for hot-dip galvanized aluminum for steel products by flux method (dry method) 5%) is a water flux used in the plating flux treatment process in the alloy process. Background technique [0002] The flux method (dry method) hot-dip galvanized aluminum (or rare earth zinc-aluminum) alloy process is to immerse the steel products after degreasing and derusting in a flux (usually an aqueous solution) for an appropriate time, and then take them out and dry them. A layer of solid flux film is formed on the surface, and then immersed in the molten zinc-aluminum alloy plating solution for hot-dip plating. Relevant with the present invention, close technology has: [0003] [1] Blickwede D.J. 55% Al-Zn Alloy Coated Sheet Steel, ir...
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IPC IPC(8): C23C2/02C23C2/06
Inventor 卢燕平
Owner UNIV OF SCI & TECH BEIJING