Corrosion rate for 316L in Demi water

[ijzer]

Does any body know the corrosion rate of 316L in deminaralized water in the temperature range 40 to 80 Deg. C

 

[EdStainless]

Well, by normal standards it is zero.
But if you are talking about high purity water then you may concerned with ppb levels of metals in your water. That is a whole other story.
How pur is your water?
What pH, what O2 level?
Will the system ever be cleaned/sanitized/sterilized? If so, how?

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[ijzer]

Thanks for your reaction.
There are no metals in the water. It is very pure. The pH is 5.8. It is saturated with Oxygen (6 mg/l), that's what worries me.
The temperature could even be up to 120 Deg. C
Any corrosion rate curves available for this?

 

[EdStainless]

How very pure? 25 megaohm? 28 megaohm?
You can pick up some metals.
There have been papers given at SEMI on this topic.
I don't have any of them.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[metengr]

Is this question in reference to intergranular stress corrosion cracking (IGSCC) of cold worked 316L ss? I remember a while back when I was exposed to the nuclear side of the business that under certain conditions of residual tensile stress, high purity water, dissolved oxygen and temperatures at or above 160 deg F, low carbon 304/316 ss material can develop IGSCC in service, similar to sensitized material. The key was the amount of residual cold work that effected susceptibility to IGSCC.

Some sources for papers on this subject would be The Metallurgical Society (TMS).