Hastelloy C 276 1

jppmj · Sep 8, 2003

We have built a quencher in Hastelloy C276. The purpose is to saturate a gas (air + HCl 1000 mg/Nm3 @ 200°C) with a 4% aqueous HCl solution. The gas outlet is at 85°C.

After 8 monthes running we watch corrosion on hastelloy C 276.
Has anybody an explanation ?
Thank you

unclesyd · Sep 8, 2003

If you have any oxidizing conditions you will have corrosion of C-276. You can get an oxidizing condition with your setup. I was involved with a similiar problem. Idle or slow flow conditions can get you in trouble due to the formation of 27° baume HCl as a condensation product, which if saturated with Oxygen can be oxidizing.

hacksaw · Sep 8, 2003

don't beilive c276 is suited for weak acid at 200 oC

you might try an alternate technology based on direct quenching

jppmj · Sep 9, 2003

Thak you, Unclesyd and Hacksaw for your answer.
Hacksaw what do you mean by direct quenching ?
Best regards
JPPMJ

hacksaw · Sep 9, 2003

common to use direct sprays to quench gases(licensed technology and several designs are available). this results in the greatest cooling rate (or can) and is used to advantage where the metal temperatures must be kept low.

PVRV · Sep 10, 2003

What type of corrosion "pitting" ?if not; please elborate else refer to unclesyd post. What coatings, were considered if any.

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Hastelloy C 276 1

jppmj

Chemical

Recommended for you

unclesyd

Materials

hacksaw

Mechanical

jppmj

Chemical

hacksaw

Mechanical

PVRV

Mechanical

Similar threads

Part and Inventory Search

Sponsor