Novel efficient zinc-series surface conditioning agent as well as preparation method and application thereof

Abstract

The invention relates to a novel efficient zinc-series surface conditioning agent as well as a preparation method and application thereof. The zinc-series surface conditioning agent is prepared from the following components in percentage by weight: 30 to 40 percent of titanium salt, 20 to 25 percent of polyphosphate, 3 to 5 percent of organic polymer sodium salt, 15 to 20 percent of fluoride and 10 to 32 percent of sodium carbonate. A large number of compact and fine crystals can be formed on the surface of the metal workpiece, and the coverage rate of the crystals reaches up to 99.2%, so that the phenomenon of coating coarsening can be overcome, and the defects of uneven corrosion and the like caused by strong-alkaline degreasing or strong-acid rust removal of the metal workpiece can be eliminated; meanwhile, the phosphating speed of the metal workpiece can be increased, the treatment time of the metal workpiece is shortened, corrosion of an acidic phosphating solution to the metal workpiece is prevented, phosphating sediment is reduced, and the service life of the solution is prolonged; the problems that an existing zinc-series surface conditioning agent is low in crystal coverage rate, long in film formation time, short in bath solution service cycle, poor in stability, poor in adhesive force and poor in corrosion resistance, and a solution is prone to sediment generation and deterioration are solved.

Description

technical field [0001] The invention relates to the fields of new material synthesis and surface treatment, in particular to a novel and efficient zinc-based surface conditioner and a preparation method and application thereof. Background technique [0002] The colloidal titanium surface conditioner is a surface adjustment process applied before the phosphating of the workpiece. The use of the colloidal titanium surface conditioner can change the micro-state of the metal surface. The surface treatment of the workpiece before phosphating has a great influence on the quality of the phosphating film, especially It is pickling or high-temperature strong alkali cleaning that has the most obvious effect on thin-layer phosphating. The research results show that there is a complete oxide layer of ferric oxide and ferric oxide with a thickness of 10A to 50A on the surface of the cold-rolled steel sheet. If the cold-rolled steel sheet is pickled, the ferric oxide oxide layer on the s...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new type of high-efficiency zinc-based surface regulator and its preparation method and application, which can form a large number of dense, small, and uniformly distributed crystals on the surface of metal workpieces in a short time and at a relatively low temperature. , and the coverage rate of crystallization is as high as 99.2%, so that it can effectively change the state of the surface of the metal workpiece to overcome the phenomenon of coarsening of the film and eliminate the defects of uneven corrosion caused by the strong alkaline degreasing or strong acid derusting of the metal workpiece ; At the same time, it can also increase the phosphating speed of metal workpieces, shorten the processing time of metal workpieces, prevent the corrosion of metal workpieces by acidic phosphating solution, reduce phosphating sediment and prolong the service life of the solution, so that it can effectively solve the current The zinc-based surface regulator has low coverage of dense crystals, relatively long film formation time, short service life of the bath solution after slotting, easy to produce sediment, easy to deteriorate, poor stability, poor adhesion and poor corrosion resistance.

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