Corrosion behavior of niobium and Nb-25 wt% Ta alloy in sulfuric acid solutions

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3585276· OSTI ID:7238158

Robin, A; Nunes, C A ^[1]; de Almeida, M E ^[2]

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1. Fundacao de Tecnologia Industrial, Centro de Materiais Refratanios, Polo Urbo, Industrial Gleba Al-6, 12600 Lorena, Sao Paulo (BR)
2. Dept. de Quimica da Univ. Federal da Paraiba, CCEN, Cidade Univ., 58040 Joao Pessoa, Paraiba (BR)

In this paper the corrosion behavior of niobium and Nb-25 wt% Ta alloy in H{sub 2} SO{sub 4} solutions has been studied. Using mass-loss techniques, the influences of H{sub 2}SO{sub 4} concentration, temperature, and exposure time have been examined. The Nb-Ta alloy is more corrosion resistant than pure niobium. The obtained corrosion data allowed the construction of iso-corrosion curves of both materials in sulfuric acid below and above the boiling point.

• OSTI ID: 7238158
• Journal Information: Corrosion (Houston); (United States), Vol. 47:6; ISSN 0010-9312
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION RESISTANT ALLOYS
CHEMICAL COMPOSITION
NIOBIUM ALLOYS
CORROSION
SULFURIC ACID
CORROSIVE EFFECTS
TANTALUM ALLOYS
TEMPERATURE EFFECTS
TIME DEPENDENCE
ALLOYS
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
360105* - Metals & Alloys- Corrosion & Erosion