Pitting Corrosion of Amorphous Ni–Zr Alloys in Chloride Ion Containing Sulfuric Acid Solutions

• Kawashima A.

  Institute for Materials Research, Tohoku University

• Yu W.-P.

  Beijing University of Aeronautics and Astronautics

• Zhang B.-P.

  Institute for Materials Research, Tohoku University

• Habazaki H.

  Institute for Materials Research, Tohoku University

• Asami K.

  Institute for Materials Research, Tohoku University

• Hashimoto K.

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• Pitting Corrosion of Amorphous Ni Zr Al
• Pitting Corrosion of Amorphous Ni–Zr Alloys in Chloride Ion Containing Sulfuric Acid Solutions

Abstract

The pitting corrosion behavior of the melt-spun amorphous Ni–Zr alloys with 30–75 at% zirconium, the crystalline arc-melted counterparts and the sputter-deposited Ni–Zr alloys with 20–84 at% zirconium was examined by electrochemical measurements in deaerated 0.5 kmol/m³ H₂SO₄ with and without 0.1 kmol/m³ NaCl at 303 K. In the sulfuric acid solution without Cl⁻, these alloys were spontaneously passive and their potentiodynamic behavior was similar to each other. In the Cl⁻-containing solution, all the melt-spun amorphous alloys suffered pitting during anodic polarization and the pitting potential decreased with an increase in zirconium content. On the other hand, the crystalline arc-melted low zirconium alloys suffered pitting but no pitting observed for the crystalline alloys containing 70 at% zirconium or more. In addition, the pitting potential increased with the zirconium content of crystalline alloys. All the sputter-deposited alloys did not suffer pitting regardless of the amorphous and crystalline structures. Therefore, the melt-spun amorphous alloys were the most susceptible to pitting corrosion. A marked difference was observed in the pitting behavior between the shiny side (top side) and the dull side (wheel side) surfaces of the melt-spun ribbon. The pits initiated from the dull side surface. Thus, the dull side surface could be responsible for such an unusual pitting behavior of the melt spun ribbon.

Journal

• Materials Transactions, JIM

  Materials Transactions, JIM 38 (5), 443-450, 1997

  The Japan Institute of Metals

Keywords

• amorphous alloy
• nickel-zirconium alloy
• pitting corrosion
• polarization curve
• acidic chloride solution

Details

• CRID: 1390001204245499904
• NII Article ID: 10002452603
• NII Book ID: AA10699969
• DOI: 10.2320/matertrans1989.38.443
• COI: 1:CAS:528:DyaK2sXkt1aqtLg%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL BIB ID: 4231133
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4231133
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/38/5/38_5_443/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed