We have been asked to refurbish some aluminium parts that have been hard chromed, the coating has peeled away in a section. Is there any way of stripping the chrome off without damaging the aluminium, or at least minimising the amount of etch.
Colin Hawke A Class Metal Finishers - Adelaide, South Australia, Australia
A warm chromic acid solution with zero sulfate, about 20 oz/gal is fine, make the part anodic, about 9 volts if I remember correctly, and the chrome will come off rapidly. Where the solution gets to the aluminum, it will anodize a thin layer and not conduct much current. Standard alkaline etch will remove the chromic anodize rapidly.
James Watts - Navarre, Florida
finishing.com is made possible by ... this text gets replaced with bannerText
Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.
If you are seeking a product or service related to metal finishing, please check these Directories: