For one of our project, because of environmental constraints, We have got COMPANY approval to use Sulfuric Acid as chemical for Pickling and Passivation instead of Nitric Acid. COMPANY is asking to do Ferroxyl testing and Passi Testing. Ferroxyl testing requirements are specified in A380. However, no detail found about Passi Testing. It is requested if someone can please share any detail about Passi Testing. Much Appreciate if ASTM number is shared. Thanks
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