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Rusting passivator

A passivating agent and accelerator technology, applied in the direction of metal material coating process, etc., can solve the problems of secondary corrosion of steel surface, inability to form protective film, etc. Effect

Active Publication Date: 2016-08-24
大庆油田昆仑涂料有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pickling cannot form a protective film, and the steel surface will be corroded twice

Method used

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  • Rusting passivator

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with embodiments:

[0008] First dissolve 20KG of tannic acid with 100KG of 50℃ warm water for use, take 5KG of acrylic emulsion and 210KG of phosphoric acid into the stirring tank, start stirring at low speed, add 25KG of ethylene glycol butyl ether, dissolved tannic acid, Lactic acid 20KG, isopropanol 80KG, anhydrous ethanol 200KG and water 325KG, stir evenly. The measured indicators are as follows: solid content 45±1%; viscosity ≤100; specific gravity 1.2±0.02; PH 2~3; 30 minutes of surface drying; 24 hours of actual drying; 24 hours of coating time; solid content of 46.8%; Brookfield viscosity less than 500mPa.S; water resistance of the coating film (48h): no blistering, shedding and discoloration; gasoline resistance (48h): no change; freeze-thaw stability (3 times) no change.

[0009] In the above scheme, tannic acid is a polyacid containing both hydroxyl and carboxyl groups. Its molecular weight is ...

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Abstract

The invention belongs to a rusting passivator. The passivator is prepared from, by weight, 5-10 parts of acrylic emulsion, 10-20 parts of transformation accelerant tannin, 70-80 parts of penetrant isopropanol, 150-200 parts of assistant absolute ethyl alcohol, 150-210 parts of film-forming agent phosphoric acid, 20-30 parts of transformation accelerant lactic acid, 25-30 parts of butyl cellosolve and 350-425 parts of water. By means of a macromolecular composite organic acid group in the rusting passivator, rust is reduced into passivation components with the rust protection capacity, molecular rearrangement of polymeric micelle happens on a metal matrix, and film forming is achieved through crossing. A film layer has high closing performance, high rust removal performance and high adhesive force, and therefore the problem of secondary rusting of coating generated after rust removal is solved thoroughly.

Description

Technical field [0001] The invention belongs to a metal surface treatment agent, and particularly relates to a corrosion passivator. Background technique [0002] Rust removal treatment on steel surface is a necessary step such as coating anticorrosive paint on steel surface. There are roughly the following methods for rust removal and decontamination: Shot blasting: Using the high-speed operation of mechanical equipment to throw steel shots of a certain size by the centrifugal force of the throwing head, the thrown steel shots collide with the components violently to achieve A method for the purpose of removing rust on the surface of steel. It uses two types of steel shots: cast iron shots and cut steel wire shots. Cast iron shots are iron shots with a particle size of 2 to 3 mm formed under the condition of spraying and rapid cooling of molten iron. The surface is very round. It is relatively cheap but less durable. In the shot blasting process, the iron pellets are crushed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/08
CPCC23C22/08
Inventor 王纯万书青
Owner 大庆油田昆仑涂料有限公司
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