Cleaning agent used before phosphorus-free coating

Abstract

The invention discloses a cleaning agent used before phosphorus-free coating. The cleaning agent is prepared from the following components of, in percentage by weight, 10% of sodium metabisulfite, 4%of ferrous sulfate, 2% of sodium tripolyphosphate, 15% of isopropanolamine, 10% of alkyl alcohol amide, 30% of acrylic acid, 5% of polypropylene cold-drawn fiber, 6% of titanium acetylacetonate, 5% ofwater-based silane coupling agent, 10% of water-based organic resin emulsion, 2% of defoaming agent, 3% of sodium tripolyphosphate, 4% of alkyl glycoside, 3% of sodium tripolyphosphate, 20% of organic resin, 4% of sebacic acid, 20% of polyurethane, 50% of ethyl orthosilicate and the balance water. According to the cleaning agent, a phosphorus-free cleaning auxiliary agent and a surface active agent which are high in stability and good in compatibility are added into the formula, the cleaning force of the degreasing agent is improved through the mutual synergistic action of the phosphorus-freecleaning auxiliary agent, the surface active agent, and the other components in the formula, and the residual degree on a cleaned workpiece is greatly reduced due to the strong solubility of the components in water in the degreasing agent, and the subsequent working procedure is not influenced.

Description

technical field [0001] The invention relates to a cleaning agent used before phosphorus-free painting. Background technique [0002] The traditional phosphating surface treatment technology with a history of nearly a hundred years of industrial use is gradually being replaced by non-phosphorus surface treatment technology (silane / ceramic, etc.) due to environmental protection requirements. The degreasing and oil removal before phosphating and the residue after degreasing and washing have a certain influence on the appearance, adhesion and corrosion resistance of the phosphating film, because the thickness of the conversion film layer of the non-phosphorizing technology is less than one tenth of the thickness of the phosphating film layer. 1. Therefore, the phosphorus-free pretreatment technology has higher requirements on the cleaning power and residue of the supporting phosphorus-free water-based degreasing agent, otherwise it will have a greater impact on the appearance, a...

AI Technical Summary

Problems solved by technology

However, they will still remain on the surface of the treated workpiece even after multiple subsequent washings, which will have a great impact on subsequent processes, such as affecting the appearance, adhesion and corrosion resistance of the coating.