Materials and Corrosion

Cover image for Vol. 67 Issue 5

Online ISSN: 1521-4176

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Recently Published Articles

  1. Combined corrosion and fatigue performance of joined materials for automotive applications

    F. Vucko, N. LeBozec, D. Thierry, B. Weber, L. Dosdat, G. Luckeneder, T. Bschorr, K. Rother, C. Sciaboni and J. Sczepanski

    Version of Record online: 17 MAY 2016 | DOI: 10.1002/maco.201608962

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    The aim of this study is to evaluate fatigue performance of joined assemblies (spot weld and/or adhesive bonding) in corrosive environment. Various assemblies have been tested in alternated and simultaneous fatigue-corrosion modes. Adhesive joints are strongly affected by simultaneous fatigue-corrosion with a large drop of the fatigue life compared to results in air.

  2. Cathodic protection of soil buried steel pipelines – a critical discussion of protection criteria and threshold values

    U. Angst, M. Büchler, B. Martin, H.-G. Schöneich, G. Haynes, S. Leeds and F. Kajiyama

    Version of Record online: 9 MAY 2016 | DOI: 10.1002/maco.201608862

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    This paper reviews the state-of-the-art about the generally accepted understanding of the working mechanism of cathodic protection of ground buried steel structures. Based on this, limitations of existing protection criteria are discussed, particularly the difficulties related to measuring and interpreting current-applied potentials, instant-off potentials, and IR-free potentials.

  3. Effect of alloy composition on the oxidation-induced boron depletion in cast Ni-base superalloy components

    W. J. Nowak, D. Naumenko, A. Jałowicka, D. J. Young, V. Nischwitz and W. J. Quadakkers

    Version of Record online: 8 MAY 2016 | DOI: 10.1002/maco.201608837

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    The high temperature air oxidation of the two conventionally cast Ni-based superalloys Rene 80 containing 92 wt ppm boron and CM 247 containing 110 wt ppm of boron was studied at temperatures between 850 and 1050 °C and times ranging from 1 to 100 h. In both alloys, boron depletion in the bulk alloy occurred due to formation of boron rich oxide. The extent of depletion was substantially higher for the chromia forming Rene 80.

  4. Effects of cobalt content on mechanical and corrosion properties of electroless Ni-Co-P/TiN nanocomposite coatings

    L.T. Shi, J. Hu, L. Fang, F. Wu, X. L. Liao and F. M. Meng

    Version of Record online: 8 MAY 2016 | DOI: 10.1002/maco.201608844

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    Ternary Ni-Co-P/TiN nanocomposite coatings with Co content in the range of 0–23 wt% were co-deposited on Al alloys by electroless plating. The micro-hardness, adhesion force, friction coefficient, and corrosion resistance enhance with the increase of Co content. The improved corrosion resistance of Ni-Co-P/TiN coating is due to the passivation behavior and small grain caused by the introduction of Co.

  5. Lifetime of 7YSZ thermal barrier coatings deposited on fluorine-treated γ-TiAl-based TNM-B1 alloy

    N. Laska, S. Friedle, R. Braun and M. Schütze

    Version of Record online: 8 MAY 2016 | DOI: 10.1002/maco.201608918

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    A thermal barrier coating (TBC) system was manufactured on a Mo-containing γ-TiAl-based alloy utilizing the halogen effect to ensure the formation of thin protective oxide scales. Samples were treated with fluorine using hydrofluoric acid, an F-polymer spray, or plasma immersion ion implantation and subsequently exposed to air at 900 °C for 24 h. The F-polymer treatment proved to be the most effective fluorination method.