52070

Pin holes problem after hard chrome plating  

April 23, 2009

Dear Sir!
I observe Pin holes just like dots after hard chrome plating in piston rod. I am not find out actual root cause, supplier told this is cause of raw mateial. Please sir provide me proper out cause from which this problem can be solved.

Crack observed just like net in plated area after hard chrome plating in piston rods.
Please sir give me proper guide line for this problem.

Hare Ram Yadav
Product designer - Gurgaon, Harayana, India

are these rods hardened?
in case they are you need to do proper pretreatment

Prashant Soman
- Thane, Maharashtr , India

Do you have a:
Soak Clean.- Must to be aggressive
Electroclean.- 5 mins in it
Wash
Neutro .- Make it in the same way than electro and put some voltage
Wash
Wash
wash
Nickel/Chrome/
or Hard Chrome

Sergio Samaniego
Mexicali, Baja California, Mexico

1.You need to check the material pin holes before plating.
2.Proper cleaning is required before plating
3.If part is hardened you need to do Hydrogen deembrittlement after plating for 2 hours at 200 degrees.

Sudheer Babu
- Bangalore, India