Allowable Chlorine levels at high temp for stainless 1

[Mark31]

I am looking for a graph that shows the allowable chlorine levels at high temperatures for various stainless steels. Typically the curve will have the chlorine ppm on the X axis and temperature on the Y axis with a curve for each material. If anyone has one or knows where I can get on, it would be appreciated. I am working in the boiler industry and can not seem to find this information anywhere.

 

[bilge]

Philip A. Schweitzer's book, "Corrosion Resistance Tables," has some data on the corrosion of a few stainless steels at a few Cl concentrations as a function of temperature.

A better reference might be the ASM's Metal Handbook, volume 13, titles "Corrosion." It has a chapter on "Corrosion of Stainless Steels."

Probably your best bet would be to contact your local stainless steel provider.

 

[rustbuster1]

There's a big difference between chlorine and chloride when it comes to stainless steel corrosion propensity, depending on the nature of the chlorine also. This seems like dry hot chlorine gas, which 316 SS can handle to 400F according to industry tables. Chlorine gas in combustion gases is not normally considered a corrosive component - based on pulp and paper industry experience.

You'll get better replies if you are more accurate with your problem description.

 

[Mark31]

Thanks rustbuster, I am sorry that my question is a little vague. I am trying to collect data on chlorines and on chlorides. You refer to industry tables, can you let me know where I can find them?
Just to give you (and anyone else that is interested) some background; the question stems from Cl in fuels fired in boilers. I am trying to develop a standard so that boiler component materials can be selected based on the Cl in fuel.

 

[rustbuster1]

This is complicated territory. The chlorides in the fuel can affect the composition of the ash and other deposits, which in turn affects the melting point. This is critical to defining whether molten deposits form - they are much more aggressive than solid deposits. There is a lot of work on this in the literature- prolific authors are Mik Hupa at Abo University in Finland and Tran at the Univ of Toronto. Most of their work is for pulp and paper recovery boilers but should be extrapolable to refuse combustion. They also have done good phase analyses to show what gaseous or solid species are stable in various combustion gas conditions.

I hope this smoothes your path...

 

[Mark31]

Thanks again Rusty,

Do you know if the references you gave me above have a website?