A clean surface is required for Alloy C276/UNS N10276/C-276 to achieve optimal corrosion resistance.
Surface oxides formed during annealing or welding deplete chromium very close to the scale base metal interface. As such, acid treatments which remove surface metal under scaled surfaces are necessary for optimum corrosion resistance.
The corrosion resistant properties of Alloy C276/UNS N10276/C-276 make descaling difficult. Stainless steel wire brushing or grit blasting is advisable, followed by immersion in a mixture of nitric and hydrofluoric acids and a through water rinse.
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