Organic promotive phosphating liquor as well as preparation method and use thereof

Abstract

The invention provides an organic promoting phosphating solution, a preparation method thereof and the application thereof; wherein, the phosphating solution comprises basic solution and an accelerant which have the weight ratio of 1.5-2.5:1; the basic solution is the mixture of iron powders, phosphoric acid, zinc oxide, hydrofluoric acid, carbonate, fluosilicic acid and water; the accelerant is the mixture of sodium fluoborate, tartaric acid, sodium chlorate, caustic soda, trinitrobenzene sulfonic acid and water. The phosphating solution has wide phosphating process, can be used within the temperature of 5-65 DEG C, is suitable for the treatment before coating of automobiles, electric apparatuses, furniture and mechanical equipment, has simple production and use methods and meets the requirement of environmental protection.

Description

technical field

[0001] The invention relates to a phosphating solution, a preparation method and an application, in particular to a nickel-free wide-temperature phosphating solution, a preparation method and an application thereof. Background technique

[0002] Before painting, metal generally needs to be pretreated in a solution containing phosphate to form a chemical conversion film of metal phosphate. This process is called phosphating. The main purpose of phosphating before painting is to provide short-term inter-process protection for the base metal, to prevent the metal from being corroded to a certain extent, and to improve the adhesion and corrosion resistance of the paint film. With the enhancement of people's awareness of environmental protection and the increasing shortage of energy, the new coating pretreatment process is developing towards the direction of low temperature, low energy consumption, low pollution and low toxicity. Although the phosphating film for...