Phosphatizing liquid and preparation method thereof

Abstract

The invention discloses phosphatizing liquid. The phosphatizing liquid comprises the following components in percentage by weight: 7 percent of starter liquid, 0.38 to 0.4 percent of neutralizer, 0.2 to 0.6 percent of accelerator and the balance of water, wherein the starter liquid comprises the following components in percentage by weight: 30 to 36 percent of 85 percent phosphoric acid, 16 to 20 percent of 68 percent nitric acid, 15.6 to 18.4 percent of 99.7 percent zinc oxide, 0.4 to 0.6 percent of citric acid, 0.4 percent of sodium fluoride, 0.6 to 1 percent of nickel nitrate, 0.16 to 0.24 percent of ferric nitrate, 0.004 to 0.01 percent of copper nitrate and the balance of water.

Description

technical field

[0001] The invention relates to the technical field of phosphating treatment, in particular to a phosphating solution and a preparation method thereof. Background technique

[0002] Since the civilization era of slash-and-burn farming, the use of tools and dependence on metals have never stopped. With the rapid development of modern industry, the output of steel has become an important symbol to measure the comprehensive strength of a country. The continuous doubling of steel production and the fact that a large amount of steel is corroded has plagued generations of producers and users. Because of this, many colleges, universities, scientific research personnel and engineering technicians have invested in the battle of steel anti-corrosion, and anti-corrosion processes and technologies such as pickling, phosphating, coating, and electroplating continue to emerge.

[0003] Phosphating treatment is an indispensable treatment process for steel materials before...