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Re: Passivation
Re: Passivation -- rplacek	Post Reply	Top of thread	Forum

Posted by: Kelly_Bramble ® 06/28/2006, 08:50:07 Author Profile eMail author Edit

Are you passivating steam pipe which have already been in use?

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Re: Re: Passivation
Re: Re: Passivation -- Kelly_Bramble	Post Reply	Top of thread	Forum

Posted by: rplacek ® 06/28/2006, 09:05:30 Author Profile eMail author Edit

The system has been in use - which is the cause of the rouging. The system was decommissioned and is now being placed back into use. I was concerned because if the passivation process removes iron and creates an oxide layer on the steel, does the steel surface need to be free of discoloration. This steam piping is almost black. But we are afraid that cleaning for the required length of time with formic acid to remove the surface stains will etch the system. I just want to be sure that passivation will work before signing off on the system. Thanks

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Re: Re: Re: Passivation
Re: Re: Re: Passivation -- rplacek	Post Reply	Top of thread	Forum

Posted by: Kelly_Bramble ® 06/28/2006, 09:17:31 Author Profile eMail author Edit

Somebody correct me if I'm wrong, passivation is a surface purifying process for stainless steel. I believe this process is used to remove any impurities which have entered onto the material surface during processing. Nothing against passivation, however I am not sure there is any added value in your application. I see it as kind of like purifying a mop used to clean up the garage floor.. Modified by Kelly_Bramble at Wed, Jun 28, 2006, 09:19:43

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Re: Passivation
Re: Passivation -- rplacek	Post Reply	Top of thread	Forum

Posted by: Lotus14 ® 06/27/2006, 16:16:25 Author Profile eMail author Edit

i assume these pipes are stainless? If so the surface condition, as long as they are clean should not matter.

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