Water-based metal cleaner

Abstract

The invention provides a water-based metal cleaner, relating to a technology of pretreatment of processes of metal coating, electroplating, hot dipping coating and the like, in particular to a technology of cleaning the pretreatment surface of carbon steel. The water-based metal cleaner provided by the method comprises the following components of: 190 to 220 g / L of industrial hydrochloric acid, 1.7 to 8.5 g / L of phosphoric acid, 1 to 5 g / L of oxalic acid or 1 to 5 g / L of tartaric acid, 1 to 2.2 g / L of fatty alcohol polyoxyethylene lauryl ether sulfate sodium AES or 1.5 to 2 g / L of sodium dodecyl sulfate, 0.6 to 1.6 g / L of peregal 0-15, and 2 to 2.3 g / L of fatty alcohol-polyoxyethylene ether AEO-9. The cleaner can fast, effectively and synchronously complete two processes of deoiling and derusting on the metal pretreatment surface, can effectively prevent acid mist from volatilizing, prolongs the service life of equipment and improves the working environment of labor workers.

Description

technical field [0001] The invention relates to the technical field of pretreatment of metal phosphating, coating, electroplating and hot-dip plating, and provides a highly efficient, energy-saving and environment-friendly water-based metal cleaning agent, especially belonging to the technical field of carbon steel pretreatment surface cleaning. Background technique [0002] Since the quality of metal surface pretreatment directly affects the bonding force between coating or coating materials and metal base materials and the integrity of the coating, we have very strict requirements for metal surface pretreatment technology. The metal surface after coating or pre-plating treatment should meet the following requirements: 1) There is no oil on the surface; 2) There is no excess residual foreign matter; 3) There is no rust and oxide film; 4) The surface reaches a certain degree of roughness; 5) The surface is dry, moisture-free, and dust-free; 6) The metal matrix is ​​exposed a...

AI Technical Summary

Problems solved by technology

In the pickling process, due to the strong volatility of the pickling liquid, even if the production environment is ventilated by opening windows and using a strong exhaust device, the effect is very small. A large amount of acid mist is volatilized, which seriously affects the safety of other equipment in the workshop. The service life of equipment increases continuously, and at the same time, it poses a serious threat to the health of operating workers.

[0004] Along with the continuous development of metal pretreatment technology, water-based metal surface cleaners that can remove oil and rust simultaneously have also appeared in recent years, such as CN101440495A, CN101492823A, CN101165210A, CN1055961A, etc. all disclose an acidic water-based cleaning agent. Metal cleaning agent can remove oil and rust simultaneously in the same solution, but due to the defects of the formula and the proportion of each component, a large amount of cleaning agent is consumed during metal surface treatment, and the final cleaning effect is not ideal. also relatively slow