Low-temperature phosphating solution containing carboxymethyl cellulose sodium

Abstract

The invention provides a low-temperature phosphating solution containing carboxymethyl cellulose sodium. The low-temperature phosphating solution is a mixed solution prepared by the following components by weight: 420 to 430g of 80% of phosphoric acid, 120 to 125g of zinc oxide, 5 to 7g of ammonium molybdate, 12 to 13g of citric acid, 100 to 150g of zinc nitrate, 4 to 6g of acetic acid, 1 to 2g of carboxymethyl cellulose sodium, 2.0 to 2.5g of chromic acid and water for the rest. The low-temperature phosphating solution is an energy-saving phosphating solution with excellent performance and has the advantages of stable performance, high film forming speed, strong paint film bonding force and good corrosion resistance while in use. The low-temperature phosphating solution is suitable for coating pretreatment of various types of steel iron products such as manufacturing of automobiles, home appliances, agricultural machines and the like so as to enhance the corrosion resistance and increasing the paint film bonding force of the steel iron products in a spraying or soaking way.

Description

technical field [0001] The invention relates to the field of metal surface pretreatment, in particular to a low-temperature phosphating solution containing sodium hydroxymethyl cellulose. 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 phosphating quality, and waste residue and waste liquid. Disadvantages such as emis...

AI Technical Summary

Problems solved by technology

[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 phosphating quality, and waste residue and waste liquid. Disadvantages such as emission, complicated maintenance, pollution to the environment, and high cost

With the development of domestic phosphating technology, there are also room temperature phosphating solutions on the market, but during use, the processing time is too long, the work efficiency is low, and the performance is unstable during use.