Materials and Corrosion

Cover image for Vol. 68 Issue 4

Early View (Online Version of Record published before inclusion in an issue)

Online ISSN: 1521-4176

VIEW

  1. 1 - 20
  2. 21 - 40
  3. 41 - 49
  1. ARTICLES

    1. Cr diffusion and continuous repairing behavior during high-temperature oxidation of duplex stainless steel

      L.C. An, J. Cao, T. Zhang and Y.T. Yang

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201609387

      Thumbnail image of graphical abstract

      The initial oxidation behavior of duplex stainless steel was investigated at different temperatures in laboratory conditions through scanning electronic microscopy and Raman spectroscopy. Increased diffused Cr content could induce increased ferrite phase transformation into austenite and a denser Cr2O3 layer, which could lead to the continuous repairing effect of the ferrite diffusion layer.

    2. Effect of dissolved oxygen and coupled resistance on the galvanic corrosion of Cr-Ni low-alloy steel/90-10 cupronickel under simulated deep sea condition

      S. H. Xing, Y. Li, J. A. Wharton, W. J. Fan, G. Y. Liu, F. Zhang and X. D. Zhao

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201709473

      Thumbnail image of graphical abstract

      The influence of dissolved oxygen content (DOC) and coupled resistance on the galvanic corrosion rate of Cr-Ni low-alloy steel (FeCrNi) coupled with 90Cu-10Ni cupronickel alloy in simulated 500 m deep sea environment was investigated by means of weight loss measurements and SEM. The results indicated that the galvanic corrosion rate increased with the increase of DOC and decreased with the resistance increased.

    3. Enhanced inhibition of steel corrosion by L-cysteine under visible-light illumination

      P. Qiu, H. F. Yang, L. J. Yang, Z. S. Chen, L. J. Lv, Y. Song and C. F. Chen

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201609386

      Thumbnail image of graphical abstract

      The steel sample surface could cover with iron oxides and hydroxides upon contact with the sodium chloride solution, the thiol head of L-cysteine as an inhibitor exhibits a strong affinity to adsorb on the substrate in dark condition. Essentially, L-cysteine molecule can bond to the substrate through bridge adsorption, thiol, and amino group owing to the sample surface photovoltaic effect under visible-light illumination condition. So we can observe an enhanced inhibition performance.

    4. Corrosion behaviour of ruthenium laser surface alloyed austenitic stainless steel in sulphuric acid and sodium chloride solutions

      J. W. van der Merwe, F. Moyo and E. M. Phetla

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201609343

      Thumbnail image of graphical abstract

      At 25 and 45 °C 304L stainless steel enriched with 0.18 wt% ruthenium through laser surface alloying dramatically improves the corrosion and pitting resistance in 3.5 wt% sodium chloride.

    5. Effects of milling on the corrosion behavior of Al2NbTi3V2Zr high-entropy alloy system in 10% nitric acid solution

      X. R. Tan, Q. Zhi, R. B. Yang, F. Z. Wang, J. R. Yang and Z. X. Liu

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201709472

      Thumbnail image of graphical abstract

      Al2NbTi3V2Zr alloys were prepared by low-energy (LE) and high-energy (HE) ball milling and subsequent vacuum hot pressing. The corrosion behavior of the Al2NbTi3V2Zr alloy in 10 wt% HNO3 solution was investigated. Results showed that the HE bulk exhibited improved corrosion resistance than the LE bulk. Both had lower corrosion rates than Ti64.

    6. Evaluation of the role of surface pretreatments on the corrosion process. Correlation between conventional and electrochemical tests

      M. J. Gimeno Pérez, J. Molina Castellanos, R. Izquierdo Escrig, M. Puig Brugal, C. García-García, J. J. Gracenea Zapiraín and J. J. Suay Antón

      Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201609304

      Thumbnail image of graphical abstract

      It has been observed that phosphate molecules enhance the characteristics of coatings on steel. The more ordered the structure of the layer, the better improvement on properties. It has been confirmed that electrochemical tests lead to similar results than conventional measurements and give more accurate and deep information. But, in all cases, it is difficult differentiating close behaviors.

    7. Increasing corrosion resistance of a ZrTi alloy with a bioinspired coating with low porosity

      M. Vardaki, D. Ionita, A. B. Stoian and I. Demetrescu

      Version of Record online: 17 MAR 2017 | DOI: 10.1002/maco.201609408

      Thumbnail image of graphical abstract

      Zr and its alloy have become more interesting in biomedical research due to their high biocompatibility and low toxic effects. Hydroxyapatite-chitosan bioinspired coatings were elaborated to further increase biocompatibility and in the same time increasing the corrosion resistance of the alloy. Altering the ratios of hydroxyapatite and chitosan leads to significant differences in corrosion resistance.

    8. Non-destructive indication of delaminations under thick organic coatings using active IR-thermography

      G. Schmitt, C. Lenzmann, N. Schneider and R. Lobnig

      Version of Record online: 17 MAR 2017 | DOI: 10.1002/maco.201609333

      Thumbnail image of graphical abstract

      The present paper presents a new non-destructive test (NDT) method for detecting delaminations and blisters in or under organic coatings with thicknesses up to 6 mm already at stages when the defects are not yet visible. This is accomplished by active IR thermographic methods with induction and/or optically excited lock-in thermography.

    9. Predictive modeling of long-time crevice evolution at e-coat defects under climate chamber test conditions

      N.-C. Bösch, D. Höche, A. Mittelbach and K. U. Kainer

      Version of Record online: 3 MAR 2017 | DOI: 10.1002/maco.201609202

      Thumbnail image of graphical abstract

      A new modeling approach for corrosion simulations addresses the requirements of the industry to handle long simulated time scales and big geometries by reducing the complex electrochemical description to empirical data in the form of digitalized polarization curves and Tafel like fits.

    10. Evaluation of titanium carbide thin film coatings on WC-Co following surface microstructure treatments

      C. Tanaka, T. Saito, N. Okamoto, S. Suzuki, A. Kitajima and K. Higuchi

      Version of Record online: 1 MAR 2017 | DOI: 10.1002/maco.201609244

      Thumbnail image of graphical abstract

      The effects of acid or radio-frequency (RF) CF4 plasma pre-treatments before a sputtered titanium carbide (TiC) hard coating thin film were investigated to increase the adhesion strength of TiC on WC-16wt%Co substrate. The adhesion strength was maximal, with a surface roughness of Ra ≈ 150 nm, with CF4 and aqua regia treatments.

    11. Corrosion performance and mechanical properties of friction stir welded AA2024-T3 joints under different corrosion solution exposure

      N. Li, W. Y. Li, X. W. Yang and N. D. Alexopoulos

      Version of Record online: 1 MAR 2017 | DOI: 10.1002/maco.201609346

      Thumbnail image of graphical abstract

      Aluminum alloy 2024-T3 sheets were friction stir welded (FSWed) and the microstructure in the thermo-mechanically affected zone (TMAZ) and stir zone (SZ) were characterized. The effect of corrosion exposure on the joints was evaluated by immersion tests as well as electrochemical measurements. The results indicate that TMAZ and SZ of the FSWed joints present different corrosion performances for the three corrosion solutions tested.

    12. Protective pre-deposited slurry dip-coating alumina layer on TBC system

      Hesham Abdeldaim and N. El Mahallawy

      Version of Record online: 27 FEB 2017 | DOI: 10.1002/maco.201609265

      Thumbnail image of graphical abstract

      A thin intermediate protective α-alumina layer was pre-deposited by slurry dip-coating technique on APS-CoNiCrAlY bond coat prior depositing APS–YSZ as top coat. The alumina layer acts as barrier for oxygen diffusion to protect the metallic bond coat from excessive oxidation. The new TBC was compared with the standard TBC system which comprises of Ni-superalloy substrate, CoNiCrAlY bond coat and YSZ top coat.

    13. Electrochemical analysis of the ASTM F75 alloy at different pH values and temperatures

      A. I. Kociubczyk, C. M. Méndez, R. W. Gregorutti and A. E. Ares

      Version of Record online: 27 FEB 2017 | DOI: 10.1002/maco.201609394

      Thumbnail image of graphical abstract

      The electrochemical behavior of ASTM F75 alloy was analyzed in a NaCl solution at pH values of 5, 7, and 9 and temperatures of 37 and 42 ºC. The tests were performed in samples corresponding to two different regions of a hip prosthesis. Polarization curves showed that as pH increased the passivity range decreased. The temperature showed no significant effects on the electrochemical behavior of the alloy.

    14. Effect of human albumin on corrosion and biological behavior of CoCrMo

      D. Ionita, F. Golgovici, I. Demetrescu, M. Sajin and G.-R. Pandelea-Dobrovicescu

      Version of Record online: 27 FEB 2017 | DOI: 10.1002/maco.201609406

      Thumbnail image of graphical abstract

      The present paper is an investigation of human albumin effect on corossion and biological behavior of a CoCrMo alloy. The human albumin act as an inhibitor of corrosion reducing corrosion current until five time. Biological tests confirmed non hemocompatibility of CoCrMo alloy and a non trombogenic behaviour. No blood cell shape modification was observed as well.

    15. 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

      Thumbnail image of graphical abstract

      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.

    16. 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

      Thumbnail image of graphical abstract

      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.

    17. 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

      Thumbnail image of graphical abstract

      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.

    18. 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

      Thumbnail image of graphical abstract

      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.

    19. 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

      Thumbnail image of graphical abstract

      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.

    20. Effect of chemical passivation treatment on pitting corrosion resistance of AISI 410 and 17–4 PH stainless steels

      A. G. dos Santos Jr., L. V. Biehl and L. M. Antonini

      Version of Record online: 23 FEB 2017 | DOI: 10.1002/maco.201609388

      Thumbnail image of graphical abstract

      Stainless steels are materials well known for their excellent corrosion resistance. However, these alloys are especially susceptible to pitting corrosion. In order to increase the pitting corrosion resistance, chemical passivation with nitric acid is applied to AISI 410 and 17–4 PH stainless steels and its effect on pitting corrosion resistance in chloride containing media is investigated.

VIEW

  1. 1 - 20
  2. 21 - 40
  3. 41 - 49

SEARCH

SEARCH BY CITATION