Summary for chrome plated or anodized Discussion
chrome plated or anodized wheels is the key question here, and Omar from Saudi Arabia outlined a full process for chrome plating alloy wheels: ultrasonic cleaning, rinse, etch, desmut in nitric/sulfuric/ammonium bifluoride, double zincate, electroless nickel strike, then acid copper and more. He asked whether any changes would improve the result. The reply said the process sequence sounded good and did not suggest major changes. On the anodizing side, the answerer cautioned that cast aluminum wheels are unlikely to anodize attractively, predicting a dull, gray, splotchy appearance. The practical takeaway is that the posted chrome-plating sequence was considered acceptable, while anodizing cast alloy wheels was viewed as a poor cosmetic option in this discussion.
Q. Hello to all. I own a plating workshop in KSA. I’d like to expand the operation to include chrome plating of wheels.
Process so far is
1. Ultrasonic cleaning .
2. Rinse
3. Etch, rinse
4. Desmut in 30% nitric, 2% H2SO4 and 120 g/liter of ammonium bifluoride for the silicon, rinse
5. Double zincate.
6. Electroless nickel strike
Then usual acid copper and so on.
Please let me know if there are changes that can be made to improve result.
omar
– Saudi Arabia , Riyadh
July 31, 2024
A. Hi Omar,
Your process sequence sounds good to me.
I doubt that you can attractively anodize cast aluminum wheels — I think they will be dull, gray, and splotchy.
Luck & Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.