Composition for corrosion inhibitor, application thereof and method for pickling equipment
A technology of corrosion inhibitor and composition, applied in the field of fine chemical industry, can solve the problems of unstable chemical properties, equipment corrosion accidents, large differences in effects, etc., and achieve the effects of excellent corrosion inhibition performance, stable chemical properties, and less dosage.
Active Publication Date: 2018-02-13
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary
Problems solved by technology
[0008] Most of the pickling corrosion inhibitors currently used are for the corrosion inhibition of a single acid species and a single metal. They have strong specificity and large difference in effect. Mistakes, making the risk of equipment corrosion accidents greater
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0034] Weigh 1.0g of mercaptobenzothiazole, 1.0g of sodium thiocyanate, 5.0g of hydrazine hydrate, and 2.0g of ethanol, and finally dilute with water to form a solution with an effective content of 20%, and stir evenly.
Embodiment 2
[0036] Weigh 1.0g 2,2-dimercaptobenzothiazole, 3.0g ammonium thiocyanate, 2.25g hydrazine hydrochloride, 0.025g dodecyldimethylbenzyl ammonium chloride, 6.0g isopropanol, and finally dilute with water to form A solution with an effective content of 20% is stirred evenly.
Embodiment 3
[0038] Weigh 1.0g benzotriazole, 5.0g potassium thiocyanate, 0.5g hydrazine carbonate, 5.0g methanol, 5.0g ethanol, and stir evenly.
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The invention discloses a composition for corrosion inhibitor, its application and a method for pickling equipment. The composition for corrosion inhibitor contains accelerator, thiocyanate and hydrazine type corrosion inhibitor, wherein the The weight ratio of the accelerator, thiocyanate and hydrazine type corrosion inhibitor is 1:0.5-10:0.2-8. The method for pickling equipment of the present invention comprises contacting the pickling liquid containing the composition for corrosion inhibitor with the equipment. Through the above technical scheme, each component in the composition for corrosion inhibitor of the present invention can work synergistically with each other, therefore, the composition for corrosion inhibitor of the present invention has stable chemical properties and is an environmentally friendly multi-purpose corrosion inhibitor. The composition meets the requirements of environmental protection; the corrosion inhibitor composition of the present invention has wide adaptability, excellent corrosion inhibition performance, small dosage, simple treatment process and obvious effect, and is easy to popularize and apply.
Description
technical field [0001] The invention belongs to the technical field of fine chemicals, and relates to a corrosion inhibitor composition and its application and a method for pickling equipment, in particular, to a corrosion inhibitor composition and its use in equipment pickling application, and a method for pickling equipment using the corrosion inhibitor composition. Background technique [0002] Pickling is widely used in various industrial sectors (such as electric power, petrochemical, metallurgy and electronics, etc.) in heat exchange equipment, heat transfer equipment, cooling equipment, rolling scales and oxide layers of steel and other metal materials Cleaning of metal scale. Pickling of thermal equipment (such as boilers) and chemical equipment in the power sector is especially important. From a social and economic point of view, pickling can reduce fuel consumption caused by dirt; from the point of view of environmental protection, it reduces fuel exhaust gas and...
Claims
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IPC IPC(8): C23G1/06
Inventor 张建枚王足远卜少华
Owner CHINA PETROLEUM & CHEM CORP