A kind of phosphorus-free metal surface treatment agent and using method thereof

Abstract

The invention relates to a nonphosphorus metal surface treatment agent and a use method of the nonphosphorus metal surface treatment agent. The nonphosphorus metal surface treatment agent consists of the following ingredients in part by weight: 5 to 20 parts of nanometer zirconium dioxide dispersing liquid with the concentration being 28 percent, 6 to 30 parts of hydrofluoric acid, 3 to 15 parts of propylene glycol, 6 to 20 parts of octavinyl polyhedral oligomeric silsesquioxane, 3 to 20 parts of acetic acid, 0.03 to 0.5 part of rare earth cerium salt, 1 to 5 parts of sodium hydroxide and 50 to 76 parts of deionized water. The nonphosphorus metal surface treatment agent has the advantages that a nanometer silane inorganic conversion film can be formed on the metal surface after the treatment on the metal. The nonphosphorus metal surface treatment agent belongs to a replacing product of the traditional phosphorizing liquid, no phosphor and no heavy metal are contained, the nonphosphorus metal surface treatment agent can work at room temperature and can be used for surface pre-treatment of various metals, the rusting phenomenon cannot be generated in 48 hours after the nanometer silane inorganic conversion film is formed on the metal surfaces of cold rolled steel plates and the like, and is then blown to be dry, and the requirement of corrosion resistance performance in the production work procedures is met.

Description

technical field [0001] The invention relates to the field of metal surface treatment agents, in particular to a phosphorus-free metal surface treatment agent. Background technique [0002] Phosphating is a commonly used metal surface treatment technology. Due to the simple production process and low technical content of phosphating solution, it has been widely used in the metal surface pretreatment industry in my country. However, the main products such as phosphating solution and degreasing agent in the phosphating process contain heavy metal ions such as phosphate, zinc, nickel, and manganese. The direct discharge of the treated wastewater will cause serious pollution, and the direct discharge will greatly increase the cost of the enterprise. Some old enterprises even have no place to add new wastewater treatment lines, and the pollution caused is expanding step by step. With the rapid development of social economy, problems such as energy shortage, environmental polluti...

AI Technical Summary

Problems solved by technology

However, the main products such as phosphating solution and degreasing agent in the phosphating process contain heavy metal ions such as phosphate, zinc, nickel, and manganese. The direct discharge of the treated wastewater will cause serious pollution, and the direct discharge will greatly increase the cost of the enterprise. Some old enterprises do not even have space to add new wastewater treatment lines, causing pollution to expand step by step