Metal surface treatment agent and metal surface treatment process

Abstract

The invention relates to a metal surface conditioning agent, which is composed of novel organic acidity, zinc nitrate, sodium molybdate, nicdel nitrate, sodium hydrogenfluoride, phytic acid, a nonionic surfactant and water; the novel organic acidity is the organic acidity obtained by respectively reacting ethene diamine or diethylenetriamine or triethylene tetramine or tetraethylenepentamine with citric acid. A metal surface treatment technology comprises the following steps: preparing the novel organic acidity, and using the novel organic acidity for complex formulation with zinc nitrate, sodium molybdate, nicdel nitrate, sodium hydrogenfluoride, phytic acid, the nonionic surfactant and water to obtain the metal surface conditioning agent. The concrete processing flow comprises the following steps: removing oil, washing, washing, pickling, neutralizing, conditioning surface, treating surface, performing post-treatment on surface or washing, performing air drying. The surface treatment technology can replace the current phosphatization technology, and has the technology advantages of environmental protection and simple operation, and is better than the phosphatization technology from the aspect of technology index.

Description

technical field [0001] The invention relates to a novel environment-friendly metal surface treatment agent and a metal surface treatment process which replaces the existing phosphating process and does not contain inorganic phosphate. Background technique [0002] At present, in the field of metal surface treatment, the phosphating process is the main method. The phosphating process is simple to operate and low in cost. After phosphating, a uniform and dense reaction film is formed on the metal surface. Therefore, it is widely used in the industrial field, especially in the field of metal surface coating, and the phosphating before coating plays a decisive role in the quality of the coating. [0003] The phosphating process has obvious defects: the phosphating process mainly uses phosphate-based film-forming agents, and the phosphating slag produced is very serious to the environment, especially to soil and water pollution. In order to solve the pollution problem, it is con...

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Problems solved by technology

[0003] The phosphating process has obvious defects: the phosphating process mainly uses phosphate-based film-forming agents, and the phosphating slag produced is very serious to the environment, especially to soil and water pollution.

In order to solve the pollution problem, it is considered to replace the phosphating process with the silane film treatment process. The film treatment process mainly forms an adsorption film on the metal surface. The process is simple, but it cannot meet the requirements of the phosphating process, and the effect is not ideal.

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