Corrosion properties of plasma-sprayed Al2O3-TiO2 coatings on Ti metal

Song, Yo-Seung; Lee, Ingyu; Hong, Shin Nam; Kim, Bae-Yeon; Lee, Koo Hyun; Lee, Deuk Yong

doi:10.1007/s10853-006-4506-6

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…This is the main reason why the corrosion potential shifted towards negative values. song et al [52] plasma sprayed al 2 o 3 -Tio 2 with low current density (6.3×10 -8 a/cm 2 ) in the passive region, low corrosion potential (-0.55 V) and no pitting corrosion, and thus concluded that corrosion resistance can be enhanced by low porosity and smooth surface roughness. what is more, Bakhsheshi-Rad et al [53] sprayed Tio 2 by high velocity oxygen fuel (hVoF) and obtained E corr of -0.74 V and -0.58 V for the coated to uncoated samples, respectively.…”

Section: Electrochemical Properties Of the Coatingsmentioning

confidence: 99%

“…Titania is known as a corrosion resistant material. Many researchers have tested the application of Tio 2 coatings against various corrosive atmospheres, mainly using the following deposition techniques: the electrochemical anodization process [30][31][32], magnetron sputtering [3,33], dip-or spray-coating [3,10,34], and plasma or hVoF spraying [35][36][37]. however, the defects of the coatings usually enabled the penetration of electrolytes and put the substrate at risk of corrosion.…”

Section: Introductionmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Lachowicz

Winnicki

2021

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Corrosion Damage meChanisms of Tio 2 ColD-sprayeD CoaTings cold spraying as a low-temperature coating deposition method is intended for thermally sensitive materials. Due to its precise temperature control, it limits the formation of structural defects, and can therefore be easily applied to spray corrosion protective coatings made from metal or metal-ceramic powders. however, the formation of pure ceramic coatings with the use of cold spraying is still not so common. Titanium dioxide is one of the most interesting ceramics due to its photocatalytic properties. nevertheless, these types of coating materials usually work in a corrosion favoring humid atmosphere. in the presented paper, amorphous Tio 2 powder was deposited onto aluminum alloys and steel substrates and then submitted to potentiodynamic corrosion tests in a 3.5 wt.% nacl solution. The as-sprayed coating showed phase transition from amorphous Tio 2 to anatase, and also revealed porosity. as a result, electrolytes penetrated the coating and caused undercoating corrosion in the tested environment of an aqueous nacl solution. The analysis of the potentiodynamic curves showed that the presence of the coating decreased corrosion potential on both substrates. it arose from the mixed phases of Tio 2 , which consisted of photocathode -amorphous material and photoanode -crystalline anatase. The phase mixture induced the galvanic corrosion of metallic substrates in the presence of electrolytes. Moreover, pitting-like corrosion and coating delamination were detected in aluminium alloy and steel samples, respectively. Finally, the corrosion mechanism of the titanium dioxide coatings was characterized and described.

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Section: Electrochemical Properties Of the Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Lachowicz

Winnicki

2021

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“…Y.S. Song et al [8] evaluated the crystal structure and the corrosion properties of the coatings that three different oxides of CrO 2 -TiO 2 , Al 2 O 3 and Al 2 O 3 -TiO 2 were plasma-sprayed on Ti substrate. Electrochemical measurements (in 0.5 M H 2 SO 4 solution at 25 °C) and SEM results revealed that the single coatings without the bond layer always possess good corrosion resistance due to lower current density within the passive region (Fig.…”

Section: Research Developmentmentioning

confidence: 99%

Progress in Surface Corrosion-Resistance Coatings of Titanium and its Alloys

Han

Chen

2013

KEM

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Titanium and its alloys are widely used in the fields of chemistry, aerospace, biomedicine, automobile manufacturing, ship industry, and so on, due to the properties of light weight, high strength, high thermal stability and corrosion resistance. However, the shortcomings of Titanium and its alloys are prominent as well, such as unsatisfactory corrosion resistance in reducing acid, insufficient wear resistance and serious oxidation at high temperature. Surface modification can solve the problems effectively. In this paper, the recent researches of some surface modification techniques such as plasma spraying, surface alloying, magnetron sputtering and vacuum depositing to improve the corrosion resistant of titanium and its alloys are summarized. The characteristics of structures and properties of the coatings are introduced. And the future prospect of further investigations is presented.

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