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Current Position:Home > Industry news > 2205 stainless

2205 stainless steel tube surface treatment

Release Date:2017-04-21

Long distance oil and gas pipeline is an important means of energy security, in the process of oil (gas) pipeline anticorrosion construction, 2205 stainless steel tube surface treatment is one of the key factors determine the service life of the pipeline corrosion, it is a solid combination of anti-corrosion layer and steel tube can be provided. Verified by research institutions and the life of the coating depends on the quality of coating types, coating and environmental factors such as construction, steel tube surface treatment effects on coating life accounted for about 50%, therefore, should be in strict accordance with the specification on the coating on the surface of steel pipe requirements, continuously explore and summary, continuously improve steel pipe surface treatment.


1, clean


Using solvent, emulsion steel surface cleaning, to remove oil, grease, dirt, lubricants, and similar organic matter, but it cannot remove rust, scale, such as welding flux on the surface of the steel, so only as auxiliary means in the anti-corrosion production.


2, tools, cleaning


2205 stainless steel tube is mainly USES steel wire brush tool for steel surfaces such as grinding, can remove loose or cock scale, rust, slag, etc. Hand tools can achieve derusting Sa2 level, power tool cleaning can reach grade Sa3, if solid iron oxide adhered on the surface of the steel, tool cleaning effect is not ideal, anchor pattern depth of anticorrosion construction requirements


3, pickling


Commonly used chemical and electrolytic pickling process, two methods do use only pipeline anticorrosion chemical pickling, can remove scale, rust, old coating, sometimes can be used as sandblasting derusting after reprocessing. Chemical cleaning while can make the surface reaches a certain cleanness and roughness, but the anchor lines shallow, and easy to damage to the environment.