Hi Ehsan
Quote:1-pressure of acetylen 2.5 bar oxygen 2.3bar
Is this correct?
If so,
PLEASE STOP! It is
not safe and dangerous to run acetylene at this pressure (2.5 bar or 36 psi). 1 bar or 15 psi is all you should need at most.
Your powder will be similar to Metco 106F and I would recommend using the parameters for that from the 5P-II Thermospray Gun Instruction Manual for your gun at least as a starting point. You will need 2PSA air jet assembly and under this section of the manual you will find parameters.
With chromium oxide powders of this type you will be lucky to see a deposit efficiency of 20% so don't expect to see rapid coating build-up.