Cr{sup}(6+) is ubiquitous in its use for corrosion protection Basis of best corrosion resistant products - aluminum conversion coating, aluminum anodize sealing, sacrificial coating post treatment, phosphate coating "rinsing", magnesium conversion coating and anodizing, also as main corrosion inhibiting species in primers, topcoats, sealants, and other coatings Very mature: used for 50 plus years; Very robust, inexpensive (to purchase), and easy to use; Inhibits corrosion on multiple materials: Al, Fe, Mg, Zn, Cd; Comfort level of users is "high".
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