Work

Effects of Chromate and Vanadate Anions on the Hot Corrosion of Preoxidized Ni by a Thin Fused Na2 SO 4 Film at 900°C

Year: 1990

Type: article

Abstract: The effects of chromate and vanadate anions on the hot corrosion of preoxidized Ni by a thin fused film in an gas atmosphere at 900°C were investigated by use of a sodium sensor and an oxygen probe. The chromate anion suppressed the sulfidation of Ni probably by precipitating solid from the melt. However, the corrosion rate during self‐sustained hot corrosion was faster than for a pure sodium sulfate melt, probably due to the fast counterdiffusion of species. The vanadate anion rapidly attacked the protective oxide and enhanced the sulfidation of Ni causing a self‐sustained hot corrosion of Ni.

Source: Journal of The Electrochemical Society

DOI: 10.1149/1.2086437

Authors: Nobuo Otsuka, Robert A. Rapp

Institution: The Ohio State University

Language: English

Topic: High-Temperature Coating Behaviors

Subfield: Surfaces, Coatings and Films

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Division of Materials Research

Award: The Chemistry and Electrochemistry of Hot Corrosion of Metals