HCL gas

[prmmel]

We are treating chlorinated compounds through an electric cat ox. The heating chamber raised the temp to 800-900F and is manufactured from 304. about 2' downstream the material changes to AL6XN and temp up to 1000F. HCL is generated as the gas passes through the cats and the AL6XN is impervious. I am interested to know what affect lower concentrations of acid gas at 800-900F might have on the 304. After 1 month of operation, the heater was removed and some minor oxidation is apparant, but no pitting.

 

[strider6]

if it's dry gas @ low ambient temperature gas there will little corrosion, if there is possibility of water, moisture or if the temperature is high then it could be a problem. See the table in the ref below:

http://books.google.com/books?id=f_...=hcl gas corrosion 304 stainless steel&f=true

http://www.outokumpu.com/applications/corrosion/view_details.asp?name=HY02

http://www.corrosionist.com/Materials_Stainless Steel_Corrosion_Tables.htm

hope this help

S


Corrosion & Rust Prevention Control

 

[EdStainless]

The real trick is to be above the dew point. At that intermediate temp range if the 304 stays dry it should last a long time.

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