corrosion about Monel 400

Date 07-30-2004 14:45

SMAW,ELECTRODE:ENiCu-7,but can not pass the corrosion test after welding. ANYONE WHO CAN TELL ME THE REASON WILL BE REALLY APPRECIATED.

By BillM

Date 07-30-2004 15:38

First we need to know what material you are welding, 2) I couldn't find a reference to the ENiCu-7 but I did find one on ERNiCu-7. So I guess a little more information is needed. Application, material and son on

Bill

By jiweiming (**)

Date 07-31-2004 04:15

Thank u,Billm.
ENiCu-7 is stick electrode,while ERNiCu-7 is wire accordingly.The welding joint is required to resist the corrosion from cl-. After welding, I made many corrosion experiment through the method of copper sulfate-sulfuric acid test, but each time it failure to pass the test of intercystalline corrosion. I cant get the idea.would u like to give me the solution?

By zxgstone Date 11-17-2004 08:46

first,you must keep the heat input at a lower leve1,second ,i think you should analysis the chemical of Nb,the contents of Nb should keep lower too.
good luck!