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Surface Treatment Methods and Effects on Stainless Steel Pipes
Overview
Stainless steel pipe finish varies with environments. Knowing how environment will affect stainless steel pipes can help us make the right choice on stainless steel types, otherwise stainless steel pipes will also suffer from rust and corrosion. Different stainless steel pipes call for distinct surface treatment, such as:
Sand Blasted SS Seamless Pipe / Tube
Polished SS Welded Pipe / Tube
I & O Polished SS Sanitary Pipe / Tube
Pre-treatments
Pre-treatments like pickling, chemical brightening, electrochemical polishing, electroplate, passivation, black coating, color coating, chemical machining, are the important steps to do surface treatment on stainless steel pipes. Before stainless steel pipe taking shape, the surface is likely to have oils, burs, uneven surface and oxide, hence, these flaws should be removed before doing surface treatment.
The dirt that needs to be removed from stainless steel pipe finish can be divided into organic matters and inorganic matters. Organic matters include mineral oil, such as diesel, machine oil, Vaseline, paraffin, animal oil and plant oil, such as bean oil, tea oil, colza oil, lard, and beef tallow. The greasy dirt is mainly lubricating oil, cutting oil, quenching oil, polishing oil, or fingerprints generated during stainless steel pipe processing. Inorganic matters include soil, dusts, compounds etc. generated during heat treatment.
Stainless Steel Pipe Pre-treatment Procedures
Stainless Steel Pipe Surface-treatment Methods:
Pickling
Sand Blasting
Polishing
Hence, appropriate methods should be chosen as per the status of stainless steel pipe surface and the subsequent quality requirement.
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