430 stainless steel pickling passivator and preparation method thereof

Abstract

The invention discloses a 430 stainless steel pickling passivator, which comprises the following components in parts by weight: 2-4 parts of polyethylene glycol, 0.5-0.8 parts of copper sulfate, 1.5-2 parts of fluosilicic acid, lauramide propyl oxide 0.5~2 parts of amine, 0.5~0.8 parts of disodium cocoamphoacetate, 0.2~0.3 parts of triethanolamine, 0.1~0.5 parts of toluenethiourea, 0.1~0.7 parts of barium carbonate, 1~2 parts of phosphoric acid, 5~12 parts of water share. The 430 stainless steel pickling passivator has a good removal effect on oxides on the surface of stainless steel, with a removal rate of over 99%. The product is mild in nature and will not cause secondary damage to the surface of stainless steel, 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 430 stainless steel pickling passivator 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 is h...

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

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