Materials and Corrosion
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Online ISSN: 1521-4176
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Recently Published Articles
- Nickel-aluminum-bronze/Al2O3 surface nanocomposite produced by friction-stir processing: Corrosion properties and microstructure
B. Abbasi-Khazaei and S. Keshavarz
Version of Record online: 24 FEB 2017 | DOI: 10.1002/maco.201609369
Friction stir processing was applied for fabricating nanosized particles of Al2O3 as a surface composite layer on nickel-aluminum bronze alloy. In addition, the effect of nanosized Al2O3 on the microstructure, hardness, and corrosion resistance of the alloy surface was investigated. Significant improvement in the corrosion resistance of the alloy surface was observed in the friction stir processed nanocomposite sample.
- Entrapment of polyaspartic acid on silica nanoparticle for self-healing coatings
B. Qian, Z. W. Song, L. Hao and H. Q. Fan
Version of Record online: 23 FEB 2017 | DOI: 10.1002/maco.201609215
The present work studies a self-healing coating based on nanocontainers entrapped polyaspartic acid as corrosion inhibitor. To produce the nanocontainers the layer by layer deposition procedure was used. The results showed excellent anticorrosion performance in self-healing coating, indicating promising practical application in the field of organic coating.
- High temperature corrosion and electrochemical behavior of HVOF sprayed Inconel 718 coating using an innovative device: HTCMD
S. A. Galedari, M. S. Jazi, F. Azarmi and Y. C. Wang
Version of Record online: 23 FEB 2017 | DOI: 10.1002/maco.201609276
A high temperature corrosion measurement device was used to evaluate electrochemical behavior of HVOF deposited Inconel 718 coating in 3.5 wt% NaCl solution at elevated temperatures. Materials characterization by SEM, XRD, and EDS indicated formation of chromium oxide rich unstable passive layer resulted in localized protection of superalloy material that was not sufficient to provide corrosion protection for the entire surface.
- A method for determining the polarization state of the metal with the middle potential in order to calculate the corrosion rate of multi-metals complicated galvanic couple
Q. F. Hu, T. Zhang, S. J. Geng and F. H. Wang
Version of Record online: 23 FEB 2017 | DOI: 10.1002/maco.201609358
A method based on the mixed potential theory is put forward to determine the polarization state of the metal with the middle potential in tri-metals galvanic couple. The potential distribution and current density distribution of the complicated galvanic couple composed of AA5083, 20# steel, and H62 copper alloy were simulated by finite element method.
- Passivation of X65 steel in NaHCO3 solution saturated with CO2 using thin wire specimens
W. J. Shang, L. N. Xu, L. J. Qiao and J. X. Li
Version of Record online: 23 FEB 2017 | DOI: 10.1002/maco.201609405
OCP of thin wire specimen increased after a long period of immersion and the time at which OCP increase occurred depends on the concentration of NaHCO3 solution and temperature. Immersion test on X65 showed that OCP increase may be due to the filling of pores between FeCO3 grains. Small tetrahedron grains formed in the pores of large hexahedral grains to lower porosity of the film. Consequently, anodic polarization presented self-passivation.