304 stainless steel pickling passivation agent and preparation method thereof

Abstract

The invention discloses a 304 stainless steel pickling passivation agent which is prepared from the following components in parts by weight: 1 to 2 parts of magnesium stearate, 0.1 to 0.4 part of ferric trichloride, 1 to 2 parts of fluosilicic acid, 1 to 2 parts of polyoxyethylene fatty alcohol sodium sulfate, 0.5 to 0.8 part of cocamidopropyl dimethylamine oxide, 0.2 to 0.3 part of triethanolamine, 0.1 to 0.5 part of urotropin, 0.1 to 0.7 part of epoxy octyl stearate and 5 to 15 parts of water. The 304 stainless steel pickling passivation agent has an extremely good effect of removing oxides from a stainless steel surface, and the removal rate can reach 99 percent or above; and the product is mild in nature, cannot cause secondary damage to the stainless steel surface, and has commercial application value.

Description

technical field [0001] The invention belongs to the technical field of stainless steel manufacturing, and in particular relates to a pickling passivator for 304 stainless steel and a preparation method thereof. Background technique [0002] After the stainless steel is welded on site, the weld seam is pickled and passivated to remove all kinds of oil, rust, scale, welding spots and other dirt. After treatment, the surface becomes uniform silvery white, which greatly improves the corrosion resistance of stainless steel. It is suitable for various models Stainless steel parts, plates and equipment. The traditional stainless steel pickling and passivation treatment method is to divide pickling and passivation into two independent parts. There are usually pickling tanks and passivation tanks, that is, stainless steel equipment is pickled in the pickling tank to remove scale and then passivated in the passivation tank. Such treatment method, the labor intensity of the operator ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the operating environment for workers is poor, the labor intensity is high, the cost is high, and the treatment effect on the inner wall of the stainless steel pipeline is slightly poor, so it needs to be combined with other methods

[0003] In addition, the current pickling passivation paste has the following main problems: 1) The temperature range is narrow, and its pickling passivation ability is greatly reduced below zero

2) The current pickling passivation paste products use a large number of raw materials such as hydrofluoric acid, sulfuric acid, hydrochloric acid, and sodium alkylbenzene sulfonate. These raw materials are rich in elements such as fluorine, sulfur, chlorine, and sodium. Stainless steel poses a hazard

3) The current domestic production of pickling passivation paste has the disadvantages of unstable pickling passivation quality, inconsistent pickling passivation color, and large differences in different seasons

Images