Influence of Alloying Element on Corrosion Behavior of Hastelloy C-276 in Supercritical Water

Xing Ying Tang; Shu Zhong Wang; Yan Hui Li; Li Li Qian

doi:10.4028/www.scientific.net/AMM.525.40

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 525Influence of Alloying Element on Corrosion...

Influence of Alloying Element on Corrosion Behavior of Hastelloy C-276 in Supercritical Water

Abstract:

The corrosion tests of Cr, Fe and Ni of Hastelloy C-276 were studied at high temperature and pressure with different aggressive components. The results were investigated by means of graphite furnace atomic absorption spectrophotometer (AAS). The Cr forms stable oxide and NiO is unstable. There is a synergistic effect between salt and oxygen leading to a severe loss of metals. The PO₄^3-can improve the resistance to corrosion for Hastelloy C-276 due to the low-solubility phosphates. The colors of effluences can better support the changed concentrations of metals. The lost metals can reveal the corrosion mechanism of Ni-based alloys.