Obtaining Corrosion Resistance by hardfacing StainlessSteel?

Date 03-27-2010 07:08

Hello All,

I would like your help in the following problem i face:-
An acidic medium requires corrosion resistant as well as High Abrasion/erosion resistant deposits on the equipment components.
Is it possible to hardface 316 /316L type stainless steel to hardness of 59-60 HRC and yet obtain corrosion resistance .
My information is that hardfacing (chromium carbide) is not corrosion resistant.

Can someone help me and tell the procedure / product to achieve this goal.

Looking forward for your valuable answers

regards
Sanjay

By js55

Date 03-27-2010 15:23

I would suggest you contact a supplier like Specialty Alloys or Huntington Alloy. There are high nickel alloys available which result in high hardnesses for abrasion and will also have excellent corrosion resitant properties. Even at high temp.
We used such 'super ' alloys on pipe extrusion dies (Alloy 690 is one such example) when I worked at a pipe manufacturing company.
Pipe extrusion is definately an adverse condition with severe abrasion. And though corrosion was not of primary concern for us the alloys being nickel based, or even in some instances cobalt based, had excellent corrosion properties that just naturally came along with them.

By sanjayb (*)

Date 03-28-2010 09:27

Thanks Js55 for your answer,
i went thorught the special Metals site and read about Alloy 690 , which is good for high temperature corrossion.

what i meant to ask by both questions is
is there a carbide known which provides hardness coating resist corrosion ?

Thanks
Sanjay

By js55

Date 03-29-2010 12:46

I don't believe you are going to get a HRC 60 with any significant corrosion resistance.
You need to contact one of the hardfacing filler metal manufacturers.

By OBEWAN

Date 03-28-2010 16:55

In the oil industry it is common to clad carbon type high strength steels with Inconels to achieve corrosion resistance for sub sea high pressure components. I have seen it done with hot wire GTAW.

By pgoswami (*)

Date 03-30-2010 02:28

Hi Sanjay,

You may take a look at stellite alloys for this service related query. Attached are the links for Stellite -6B wrought products and other type of stellite based alloys.

http://stellite.com/Portals/0/Wrought%20Brochure%20080430.pdf

http://www.stellite.com/Portals/0/Refinery%20&%20FCCU%20Manual.pdf

Deloro stellite usually supplies welding products matching the wrought material chemistry. It may be a good idea to discuss regrading the technical aspects and get their response.

Thanks

Pradip Goswami
Welding Engineer/Specialist
Ontario Power Generation Inc.
Email-pradip.goswami@opg.com