HCL corrosion of various metal types
HCL corrosion of various metal types
(OP)
First of all I am not a chemical engineer so some of the terms I use may be incorrect but I will try to get my point across.
I have an HCL gas issue and I am looking for a table that will show at what PPM level corrosion will start of various materials.
The main materials in question are Steel, Stainless Steel, Copper, and Aluminum. I know that there are different grades of all this material that may stand up better or worse to a certain level of HCL. I am just looking for general ROM values.
thanks
Ohm's it not just a good idea, Its the law.





RE: HCL corrosion of various metal types
RE: HCL corrosion of various metal types
Reality means you live until you die. The real truth is nobody wants reality.
RE: HCL corrosion of various metal types
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RE: HCL corrosion of various metal types
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: HCL corrosion of various metal types
RE: HCL corrosion of various metal types
This is a good ref.
These excerpts are from the MTI MS-3 on HCl.
After reading these you will see why there is so much information on SS and Ni alloys in HCl, they are really the only options.
+Aluminum and Aluminum-Based Alloys
Neither aluminum nor any aluminum-based alloys are resistant to any concentration of
hydrochloric acid.
+Iron and Steel
Neither cast iron nor carbon steel is resistant to hydrochloric acid, even dilute concentrations
(<pH 4).
+Copper and Copper-Based Alloys
There are three basic problems with applications of copper and copper-based alloys in
hydrochloric acid:
-High-zinc yellow brasses suffer selective corrosion, i.e., dezincification.
-Dissolved oxygen (DO) or oxidizing contaminants (e.g., Fe+++) cause accelerated
attack.
-Corrosion products of copper are themselves oxidizing agents, cupric ions, so the
attack is autocatalytic if Cu++ can accumulate (as in a recycle stream).
Silicon bronzes such as UNS C64900 (1% Si) and C65500 (3% Si) have slightly better
resistance than other copper-based alloys because of formation of a siliceous film.
Among metals Ta and Pt are the only two that have very high corrosion resistance to hot acid.
There are many non-metallics that work very well in HCl.
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Plymouth Tube
RE: HCL corrosion of various metal types
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: HCL corrosion of various metal types
again thanks
Reality means you live until you die. The real truth is nobody wants reality.
RE: HCL corrosion of various metal types
If you ever drop below the dew point you will see the effect, even from a few hundred ppm.
Silver is very resistant, how about silver plating the Cu?
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Plymouth Tube
RE: HCL corrosion of various metal types
RE: HCL corrosion of various metal types
- NiDI publication #279
- NACE Corrosion Handbook, Volume 2: Hydrochloric Acid, Nitric Acid (#38415)
- Metal Handbook, vol.13
- Others (several Corrosion/Chemical Resistance Tables)
RE: HCL corrosion of various metal types
Aaron Tanzer
www.lehightesting.com