Environment-friendly emission reduction washing-free type metal surface treatment agent

Abstract

The invention discloses an environment-friendly emission reduction washing-free type metal surface treatment agent. The environment-friendly emission reduction washing-free type metal surface treatment agent comprises zirconium / titanium compounds, rare earth metal compounds, silane, alcohol amine, resin and the like. The zirconium / titanium compounds are mixed compounds with one or a plurality of types of hexafluorozirconic acid, hexafluorotitanic acid, potassium fluozirconate, sodium fluozirconate, ammonium fluozirconate, potassium fluotitanate, sodium fluotitanate, ammonium fluorotitanate, organic zirconium and organic titanium compounds and derived structure compounds of the mixed compounds, the rare earth metal compounds are compounds with one or a plurality of types of rare earth chloride, rare earth nitrate, rare earth hydrate, rare earth carbonate, rare earth acetate and rare earth sulfate, the rare earth chloride, the rare earth nitrate, the rare earth hydrate, the rare earth carbonate, the rare earth acetate and the rare earth sulfate contain one or a plurality of types of rare earth elements including cerium, lanthanum and neodymium, and the silane is a mixture of organicsilane coupling agents and one or a plurality of types of derivatives, hydrolysate and premixes of the organic silane coupling agents. The environment-friendly emission reduction washing-free type metal surface treatment agent has the advantages that the environment-friendly emission reduction washing-free type metal surface treatment agent which is a washing-free environment-friendly metal surface pretreatment agent does not contain phosphorus, is free of heavy metal, little in wastewater discharge, excellent in corrosion resistance and low in cost and is environmentally friendly.

Description

technical field [0001] The invention relates to a metal surface treatment agent, in particular to an environment-friendly, emission-reducing, water-free metal surface treatment agent. Background technique [0002] In the pretreatment process, phosphating is widely used in industries such as household appliances, bicycles, motorcycles and automobiles because of its good durability and anti-corrosion performance. With the continuous improvement of energy saving, environmental protection and sewage discharge requirements at home and abroad, the traditional coating ternary phosphating pretreatment materials are gradually banned by local regulations due to heavy metal pollutants such as P, Mn, Ni, etc. The new green phosphorus-free transformation Membrane technology has gradually matured and developed rapidly. This process can completely eliminate harmful substances such as P, Mn, Ni, and nitrite. Currently, there are mainly zirconium salt pretreatment processes and silane pretre...

AI Technical Summary

Problems solved by technology

However, the current zirconium salt pretreatment process and silane pretreatment process are all washing processes, which also produce a large amount of wastewater