Normal-temperature thick-film zinc phosphide phosphating solution and experimental method for determining component proportions

Abstract

The invention discloses a normal-temperature thick-film zinc phosphide phosphating solution and an experimental method for determining component proportions. The normal-temperature thick-film zinc phosphide phosphating solution comprises 270g / L of Zn(H2PO4), 100g / L of Zn(NO3)2, 0.6g / L of NaNO2, 6g / L of Ni(NO3)2, 10g / L of Ce(NO3)3.6(H2O), 1.5g / L of citric acid, and 1ml / L of an OP emulsifier, wherein the time is 20 minutes; the experimental method for determining component proportions of the normal-temperature thick-film zinc phosphide phosphating solution comprises the following steps: preparing a solution; preparing a phosphating film; and testing performances. Due to the normal-temperature thick-film zinc phosphide phosphating solution comprising the components, the formed phosphating film is dark grey and free of hanging ash; the film is even and continuous and has complete coverage; the relationship between film weight and film thickness is about 1 to 1; the average film weight exceeds 18.13g / L; the obtained phosphating film is a heavy film and is mainly used for preventing stored spare parts from being corroded; and the phosphating film is fine in crystals, small in porosity, good in corrosion resistance, and excellent in film corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of zinc-based phosphating solutions, in particular to a normal-temperature thick-film zinc-based phosphating solution and an experimental method for determining component ratios. Background technique [0002] Phosphating treatment can be widely used in various industries, such as automobiles, machinery, shipbuilding, home appliances, military industry, aviation, etc. After years of development, phosphating technology has made many new achievements. In particular, the scope of application of phosphating has been greatly expanded, and phosphating has become an indispensable and important technology for steel processing, anti-corrosion, and decoration. In many chemical surface conversion treatment processes, phosphating treatment occupies a very important position. However, the traditional phosphating solution has high temperature, high energy consumption, and high cost. Although some phosphating solutions ha...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a normal-temperature thick-film zinc phosphide phosphating solution and an experimental method for determining the proportion of components, aiming at solving the problem of high-temperature phosphating solution cost, high energy consumption, and low-temperature phosphating solution film thickness. Thin, loose film formation, poor corrosion resistance

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