Armoloy versus Hard Chrome Plating
Armoloy versus Hard Chrome Plating
(OP)
What is the difference between Armoloy's chrome electro plating and standard hard chrome electro plating? I have had an inquiry about switching from hard chrome plating to an Armoloy plating. One of the sister branches of my employer have positive comments regarding Armoloy.
Armoloy has a web site that proclaims their superiority versus standard hard chrome plating, but the details on Armoloy's chemical composition is proprietary so how can a general comparison be made between the two options? Some coating systems like steel galvanizing have ASTM designations like G60 and G90 that can be used to compare coating weight/thickness. Stainless steels can be classified by a PREN (Pitting Resistance) number that is a factor of Cr, Mo, and N. Does a standard practice exist for rating and classifying hard chrome plating corrosion resistance?
One benefit of hard chrome plating is improved corrosion resistance. The part in question will be placed intermittently into corrosive environments. The current hard chrome plating seems to be effective as long as the part is cleaned after each usage.
Armoloy has a web site that proclaims their superiority versus standard hard chrome plating, but the details on Armoloy's chemical composition is proprietary so how can a general comparison be made between the two options? Some coating systems like steel galvanizing have ASTM designations like G60 and G90 that can be used to compare coating weight/thickness. Stainless steels can be classified by a PREN (Pitting Resistance) number that is a factor of Cr, Mo, and N. Does a standard practice exist for rating and classifying hard chrome plating corrosion resistance?
One benefit of hard chrome plating is improved corrosion resistance. The part in question will be placed intermittently into corrosive environments. The current hard chrome plating seems to be effective as long as the part is cleaned after each usage.





RE: Armoloy versus Hard Chrome Plating
From my experience it has worked as advertised under some pretty adverse conditions of polymer with the addition of TiO2 and/or Kaolin.
RE: Armoloy versus Hard Chrome Plating
RE: Armoloy versus Hard Chrome Plating
RE: Armoloy versus Hard Chrome Plating
Thin dense chrome / armoloy is still a 100% Chromium coating applied by electroplating, but with different parameters. There is no cracking, but it is very thin... 1/10th that of a typical IHC layer. It works well for corrosion as long as it doesn't get scraped/gouged off. (which happens to us all the time) If its a gentle service or you can use a very hard substrate it should do fine.