Investigation of wear, corrosion and tribocorrosion properties of AZ91 Mg alloy coated by micro arc oxidation process in the different electrolyte solutions

Demirci, Ebru Emine; Arslan, Ersin; Ezirmik, Kadri Vefa; Baran, Özlem; Totık, Yaşar; Efeoğlu, İhsan

doi:10.1016/j.tsf.2012.07.145

Cited by 57 publications

(30 citation statements)

References 32 publications

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“…11. These OCP determined under pin-on-disk conditions evidence a complex potential reflecting the combined situation between the worn and unworn surfaces on the basis of the literature; it is known that a galvanic couple is formed between the corroded and non-corroded surfaces under these conditions [24]. Important parameters affect the existence of the OCP.…”

Section: Results Of Tribo-corrosion Testmentioning

confidence: 91%

“…Therefore, the melted products are rapidly cooled by the electrolyte; whereas, solidification is achieved inside the channels and the channels start to fill up. However, shallow pores are formed at the external opening of the channels as a result of the products, which are formed as a result of melting fill-in the channels insufficiently and the outward path of the emerging gases [24][25][26]. The pores at the sizes of micron-submicron and uniform/non-uniform pores distribution are obtained depending on the coating parameters grown on Cp-Ti alloy.…”

Section: Results Of Coating Characterization Testmentioning

confidence: 99%

“…Unbalanced magnetron sputtering method is one of the PVD methods. In this method, the ion bombardment during film growth offers more flexibility, better control, and further improvement of the coating properties [24,25]. However, hard carbon-based coatings such as DLC, on the use of light metals titanium and titanium alloys are very limited [26,27].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

et al. 2015

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In recent years, various technologies have been increasingly investigated for the surface modification of Ti and Ti alloys. Microarc oxidation (MAO) is one of the effective techniques to improve surface properties. However, it has some disadvantages for sliding wear applications and/or aggressive environments. In this study, the combined MAO and closed field unbalanced magnetron sputtering process was used to deposit duplex MAO/diamond-like carbon (DLC) coatings on Ti 6 Al 4 V alloy. Analysis of the microstructures, morphology, and crystallographic structure were performed by using a SEM, Raman, and XRD. The wear, corrosion, and tribo-corrosion properties of the coatings were investigated using the pinon-disk wear test, potentiodynamic polarization test, and combining tribo-corrosion test unit, respectively. The results of this study have shown that duplex MAO/DLC coatings exhibit better wear, corrosion, and tribo-corrosion properties than the DLC or MAO monolayer on Ti 6 Al 4 V alloy substrate. MAO/DLC coatings exhibited dense structure, lower coefficient of friction and corrosion current density, and higher tribo-corrosion resistance. The results have also shown that MAO/DLC duplex coatings on Ti 6-Al 4 V substrates increased the tribo-corrosion resistance by acting as a barrier layer.

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Section: Results Of Tribo-corrosion Testmentioning

confidence: 91%

Section: Results Of Coating Characterization Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

et al. 2015

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“…In general, the MAO coatings formed on Mg alloys exhibit a heterogeneous morphology comprising of voids, pores and typical network of microcracks [20][21][22][23][24][25][26]. In order to improve the overall microstructural integrity vis-à-vis the functional properties, numerous studies were carried out so far mainly addressing the influence of MAO process parameters such as electrolyte composition and electrical parameters on the coating formation mechanism, microstructure, mechanical, tribological and electrochemical corrosion behavior [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Relative hardness and corrosion behavior of micro arc oxidation coatings deposited on binary and ternary magnesium alloys

et al. 2015

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“…The results show that the oxysalts of sodium silicate and sodium phosphate are the most favorable additives in electrolytes [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Characterization of ZrO2 ceramic coatings on ZrH1.8 prepared in different electrolytes by micro-arc oxidation

et al. 2015

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ZrO 2 ceramic coatings were directly prepared on the surface of ZrH 1.8 in silicate and phosphate electrolytes by micro-arc oxidation (MAO) technique, respectively. The microstructure, chemical composition and phase composition of ZrO 2 ceramic coatings were investigated by X-ray diffraction (XRD), energy-dispersive spectrometry (EDS) and scanning electron microscopy (SEM). The anti-permeation effect was measured by means of vacuum dehydrogenation experiment. It is found that the coating fabricated in phosphate electrolyte is more compact than that in silicate electrolyte. The coatings fabricated on the surface of ZrH 1.8 are composed of M-ZrO 2 , T-ZrO 2 and C-ZrO 2 . EDS analysis indicates that the coatings are mainly composed of O and Zr. Vacuum dehydrogenation experiment shows that the permeation reduction factor (PRF) of coating prepared in phosphate electrolyte is superior to that in the silicate electrolyte, and the PRF value reaches up to 11.2, which can enhance the resistance effect of hydrogen significantly.

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Investigation of wear, corrosion and tribocorrosion properties of AZ91 Mg alloy coated by micro arc oxidation process in the different electrolyte solutions

Cited by 57 publications

References 32 publications

Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

Relative hardness and corrosion behavior of micro arc oxidation coatings deposited on binary and ternary magnesium alloys

Characterization of ZrO2 ceramic coatings on ZrH1.8 prepared in different electrolytes by micro-arc oxidation

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