Materials and Corrosion

Cover image for Vol. 68 Issue 2

Online ISSN: 1521-4176

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Recently Published Articles

  1. Optimizing the cathodic protection system of pipeline under simulating thermocline environment in deep water by finite element method

    C. J. Li and M. Du

    Version of Record online: 6 FEB 2017 | DOI: 10.1002/maco.201609350

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    A physical model of a sacrificial anode cathodic protection (CP) system is built to simulate the pipeline CP process under the environment of the thermocline structure in deep water, which is solved by a finite element model. The effect of anode number and position on the potential distributions and CP effectiveness is discussed. The optimum positions of sacrificial anodes are determined to optimize the CP system under the heterogeneous environment in deep water.

  2. Corrosion of the galvanizing of galvanized-steel electricity transmission towers

    J. Rodger, S. Bartlett and A. Atrens

    Version of Record online: 1 FEB 2017 | DOI: 10.1002/maco.201609351

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    The remaining galvanizing layer thicknesses were measured on a selection of towers in the local Brisbane area. The galvanized steel members of the electricity transmission towers in the local area have large remaining galvanizing layer thicknesses. The measured local zinc corrosion rate of 0.18 µm per year was consistent with the low expected zinc corrosion rate of 0.1–4 μm.

  3. Comparison of cathodic delamination of poly(n-alkyl methacrylates) on iron

    J. S. Mondragón Ochoa, A. Altin and A. Erbe

    Version of Record online: 31 JAN 2017 | DOI: 10.1002/maco.201609289

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    Cathodic delamination of poly(n-alky metacrylate)s-covered iron is evaluated. It is found that the n-alkyl size in the side chains of the polymers influences strongly the barrier properties of the coatings, the surface wettability as well as the delamination rate of the polymers on the metal surface in presence of a chloride-containing corrosive medium.

  4. Failure evolution of steam-side oxide scales grown on T91 superheater tubes by acoustic emission technique

    J. Qi, K. Y. Zhou, J. L. Huang and Y. Y. Tu

    Version of Record online: 30 JAN 2017 | DOI: 10.1002/maco.201609336

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    The uniaxial tension test and the acoustic emission technique were used to investigate the damage evolution and the failure characteristics of steam-side oxide scales with varying thicknesses grown on T91 alloy tubes. The results showed the quantitative damage evolution of steam-side oxide scales, and found the oxide thickness had more significant effect on critical strain than the fracture toughness of oxide scales.

  5. Insights into the corrosion perforation of UNS S32205 duplex stainless steel weld in gas transportation pipelines

    J.-T. Yuan, H.-H. Zhang, A.-Q. Fu, C.-X. Yin, M. Zhu, N.-X. Lv, X.-Q. Xu and J. Miao

    Version of Record online: 30 JAN 2017 | DOI: 10.1002/maco.201609341

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    Corrosion perforation causes of UNS S32205 DSS weld in a gas transportation pipeline were analyzed carefully. Excess austenite was found in the HAZ, and then the pitting corrosion resistance was lowered significantly. In the condition with large potential difference between the both sides of the insulation joint and high salinity of the formation water in the pipeline, leakage current caused the preferable dissolution of weld and then the corrosion perforation.