Water-base passivator formulation and technique for anti-rust treatment of steel members

Abstract

The invention discloses a water-based passivation agent formula and a process for antirust treatment of steel components. A steel component can be subjected to antirust treatment by soaking the steel component in the water-based passivation agent at room temperature in an environment with pH value of 9.5 to 13 for 3 to 6 min, wherein the water-based passivation agent contains (per unit) sodium nitrite 1 to 10 g/L, triethanolamine 0.5 to 10 ml/L, sodium molybdate 0.1 to 5 g/L, sodium lauryl benzenesulfate 0 to 5 g/L, sodium carbonate 0 to 5 g/L, sodium phosphate 0 to 5 g/L, and sodium p-toluenesulfonate 0 to 5 g/L. The water-based passivation agent formula has the advantages of low cost and long use cycle, and is environment friendly and superior to the prior purchased organic passivation solution in antirust effect.

Description

technical field [0001] The invention relates to an antirust treatment technology for iron and steel components, in particular to a water-based passivation agent formulation for the antirust treatment of iron and steel elements, and a process for using the water-based passivator to antirust treatment for iron and steel elements. Background technique [0002] The corrosion resistance of stainless steel is mainly due to the addition of a relatively high content of chromium in the steel. The chromium is easy to oxidize and can quickly form a dense chromium oxide film on the surface of the steel, making the electrode of the steel and the electrode in the oxidizing medium The corrosion resistance of stainless steel is suddenly improved. The corrosion resistance of stainless steel mainly depends on the extremely thin (about 1 mm) dense passivation film covered on the surface. This passivation film is isolated from the corrosive medium and is the protection of stainless steel. The b...

AI Technical Summary

Problems solved by technology

[0007] The main components of existing organic passivators are mostly organic substances such as organic amines, thiourea and their derivatives. If they are left for a period of time, especially when they are exposed, they are easily decomposed by fungi in the air aerobically. Most of the products are toxic substances, black and smelly, so the usage is large, the scrap cycle is short, and it is easy to cause environmental pollution and other unfavorable factors; and the anti-rust effect is general

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