Zinc-iron metal alramenting liquid capable of being recycled at normal temperature

Abstract

The invention relates to a zinc-iron metal alramenting liquid capable of being recycled at normal temperature. The invention is characterized in that the alramenting liquid is prepared by the following raw materials by weight percent: 14-28% of phosphoric acid, 3.5-7% of zinc oxide, 12.6-17.5% of zinc nitrate, 0.14-0.56% of citric acid, 0.14-0.7% of tartaric acid and 0.14-0.84% of molybdate, and balance of water.In the invention, phosphorization is carried out in one process after oil removing and rust removing are carried out, the processes of neutralizing, surface conditioning, passivating and washing are eliminated, and a compact and uniform phosphorization membrane with strong adhesive force is rapidly formed on the surface of ferrous metal. The process greatly reduces operation procedure, the phosphorization process produces no slag, thus reducing pollution to the environment and greatly improving utilization factor of material; and energy consumption at normal temperature is reduced and water is saved. The invention has the advantages of wide application range, less investment, high efficiency and high safety, and bath solution has good stability, no deterioration or volatilization is caused, and maintenance is easy, thus being beneficial to follow-up spraying processes.

Description

technical field [0001] The invention relates to a novel environment-friendly phosphating solution for the surface treatment of ferrous metals such as iron and steel, in particular to a recyclable phosphating solution for the surface of zinc-iron metals at normal temperature. Background technique [0002] The metal is treated in a solution containing phosphate, and the phosphate chemical conversion film formed on the surface is called a phosphating film. For more than 100 years, phosphating technology has been widely used in automobiles, military industry, electrical appliances, machinery and other fields. Its main uses are anti-rust, wear-resistant and friction-reducing, lubricating, and painting the bottom layer. [0003] The existing traditional phosphating process is to use phosphating solution to phosphate the surface of metal materials and metal products at high temperature. This method has the disadvantages of high energy consumption, long processing time, unstable pho...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a highly efficient, economical and environmentally friendly metal surface phosphating solution that can be recycled at normal temperature to overcome the traditional phosphating process with complicated procedures, high temperature, harsh working environment, and the need for phosphating with sediment and discharge. Easy to rust after washing and phosphating, unstable bath solution, uneven film formation, difficult maintenance, and environmental pollution; suitable for surface treatment of various ferrous metal workpieces in the steel manufacturing industry before painting

Images