TM121 Engineered Chrome Finish
TM121 is a crack-free, chromium deposit offering a good corrosion resistance. Standard hard chrome has approximately 200 to 400 cracks per linear inch, allowing corrosive material through to attack the base metal.
TM121 crack-free chrome is a barrier coating — depositing somewhat in a softer and more ductile manner than standard hard chrome.
As deposited, it is matte gray but may be polished to a bright finish. It is often used in direct contact with molten glass.