Oxidation and Polarization Measurements on Zirconium and Zircaloy‐2 in Molten Nitrite and Nitrates at 573°K

Ramasubramanian, N.

doi:10.1149/1.2129521

Cited by 11 publications

(1 citation statement)

References 3 publications

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“…These films can be formed by oxidation in air at high temperature and/ or in molten oxyanion salts (such as molten nitrates and molten carbonates). Molten alkali nitrate eutectics are simple and convenient media for oxidation of metals and alloys because the oxide ion activity at temperature > 500 K is sufficiently high [11]. In molten nitrate the oxygen ions are originated by selfdissociation according to the equilibrium:…”

Section: Methodsmentioning

confidence: 99%

Pitting Corrosion of Some Stainless Steel Alloys Preoxidized at Different Conditions

Mahmoud¹,

Ahmed²

2007

Port. Electrochim. Acta

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The pitting corrosion of some stainless steel alloys (preoxidized at different conditions) in 3.5% NaCl solution was studied. The alloys are: one ferritic (15.05% Cr) (alloy1) and two austenitic stainless steel alloys (17.9% Cr,7.08% Ni) (alloy2) and (20.45% Cr, 8.3% Ni) (alloy3). Potentiodynamic anodic polarization and galvanic current-time measurements were used in these investigations. The susceptibility of the alloys to pitting corrosion decreases with the increase of chromium content of the alloy and with the presence of nickel in the alloy. The preoxidation of the alloys in different media improves their resistance to pitting corrosion in NaCl solution. The resistance to pitting corrosion for the investigated alloy increases according to the order: no oxidation < oxidation in air < oxidation in molten alkali nitrates < oxidation in molten alkali carbonates. This resistance to pitting corrosion may be due to the formation of a protective oxide film on the alloys' surface. The composition of this film greatly depends on the chemical composition of the alloy, on the condition of the preoxidation process, and on the temperature.

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Section: Methodsmentioning

confidence: 99%