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A rust passivator

A technology of passivating agent and auxiliary agent, which is applied in the coating process of metal materials, etc., can solve the problems of secondary corrosion on the steel surface and the inability to form a protective film, etc., and achieve high rust removal performance, high sealing performance, and easy availability of raw materials Effect

Active Publication Date: 2018-09-11
大庆油田昆仑涂料有限公司
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  • Abstract
  • Description
  • 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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  • A rust passivator

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Embodiment Construction

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

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

[0009] In the above scheme, tannic acid is a polybasic acid containing hydroxyl and carboxyl groups at the same time, and its molecular weight is relatively large. Under acidic conditions, it can b...

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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, in particular to a rust passivation agent. Background technique [0002] Iron and steel surface derusting treatment is a necessary step for steel surface to be coated with anti-corrosion coatings. There are roughly the following methods for derusting and decontaminating: Shot blasting and derusting: Use the high-speed operation of mechanical equipment to throw steel shots of a certain size by the centrifugal force of the throwing head, and the thrown steel shots collide with the components violently to achieve A method for the purpose of removing rust on the surface of steel. The types of steel shot it uses are: cast iron shot and steel wire cut shot. Cast iron shot is formed by spraying molten iron and cooling rapidly. It is relatively cheap but less durable. During the shot blasting process, the iron shot is crushed and discharged as dust after repeated impacts. Steel wire cut shot is made...

Claims

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Application Information

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Patent Type & Authority Patents(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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