Influence of Calcium Acetate Concentration in Electrolyte on Tribocorrosion Behaviour of MAO Treated Titanium

Ti-based materials are widely used for dental and orthopaedic implant applications due to their adequate mechanical properties, corrosion behaviour and biocompatibility. However, these materials are biologically inert and display poor wear resistance. In one of the most studied processes that aims to overcome these drawbacks, Ti surfaces are often covered by anodic oxide films with the incorporation of bioactive agents such as Ca and P. Although there are several works on the tribocorrosion behaviour of MAO-treated Ti surfaces, the influence of electrolyte composition on the corrosion kinetics under sliding is yet to be fully understood. In the present work, anodic oxide films were produced on cp-Ti surfaces with different calcium acetate concentrations in the electrolyte. Tribocorrosion behaviour was investigated by reciprocating sliding tests performed in 8 g/L NaCl solution at body temperature, under potentiostatic conditions. The results showed that higher concentrations of calcium acetate had a detrimental effect on tribocorrosion kinetics, however, they resulted in less mechanical damage due to alterations in the topography and structure of the MAO layer.

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The Effects of Anodic Oxide Films Produced by β-Glycerophosphate and Calcium Acetate Anodizing on Attachment and Spreding of Osteoblaste-Like Cell

Key Engineering Materials - Bioceramics 19 ◽

10.4028/0-87849-422-7.75 ◽

2007 ◽

pp. 75-78

Author(s):

Y.T. Jung ◽

J.W. Park ◽

S.I. Yeo ◽

Byung Ju Choi ◽

Kyo Han Kim ◽

...

Keyword(s):

Oxide Films ◽

Anodic Oxide ◽

Calcium Acetate ◽

Anodic Oxide Films

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Corrosion Behaviour of Titanium Anodic Oxide Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.20-28.397 ◽

1991 ◽

Vol 20-28 ◽

pp. 397-402 ◽

Cited By ~ 2

Author(s):

Shang Fen Xie

Keyword(s):

Corrosion Behaviour ◽

Oxide Films ◽

Anodic Oxide ◽

Anodic Oxide Films

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Development of novel surface treatments for corrosion protection of aluminum: self-repairing coatings

Corrosion Reviews ◽

10.1515/corrrev-2017-0056 ◽

2018 ◽

Vol 36 (1) ◽

pp. 55-64 ◽

Cited By ~ 4

Author(s):

Makoto Chiba ◽

Chinami Yamada ◽

Haruka Okuyama ◽

Minori Sugiura ◽

Sven Pletincx ◽

...

Keyword(s):

Liquid Surface ◽

Oxide Films ◽

Mechanical Damage ◽

Anodic Oxide ◽

Al Alloys ◽

Organic Coatings ◽

Al Alloy ◽

Polyurethane Coating ◽

Anodic Oxide Films ◽

Inhibitor Solution

AbstractTwo types of self-repairing coatings for the protection of Al and its alloys are reviewed: (1) organic coatings with capsules containing repairing agent and (2) porous anodic oxide films with inhibitor solution stored in the pores of the oxide film. First, polyurethane microcapsules containing liquid surface-repairing agents were synthesized and polyurethane coating with the capsules was painted on Al alloy specimens. After mechanical damage to the coating, self-repairing occurred by the reaction of water vapor in the air with the repairing agents released from the capsules. Second, porous-type anodic oxide films were formed on Al alloys, and the pores of the anodic oxide films were filled with inhibitor solutions, followed by application of a covering polyurethane layer. Inhibitors released from the pores efficiently protected the Al alloy substrate from corrosion arising from induced mechanical damage.

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The Effects of Anodic Oxide Films Produced by β-Glycerophosphate and Calcium Acetate Anodizing on Attachment and Spreding of Osteoblaste-Like Cell

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.330-332.75 ◽

2007 ◽

Vol 330-332 ◽

pp. 75-78

Author(s):

Y.T. Jung ◽

J.W. Park ◽

S.I. Yeo ◽

Byung Ju Choi ◽

Kyo Han Kim ◽

...

Keyword(s):

Surface Roughness ◽

Oxide Films ◽

Anodic Oxide ◽

Calcium Acetate ◽

Control Surface ◽

Oxide Surface ◽

Scanning Electron Micrographs ◽

Anodic Oxide Films ◽

Positive Effects ◽

Significant Difference

The effect of anodic oxide films produced by β-glycerophosphate (β-GP) and calcium acetate (CA) anodizing on osteoblast-like cell attachment and spreading were evaluated in this study. Anodic oxide films were produced in different conditions: Group 1, 0.02 M β-GP and 0.2 M CA; Group 2, 0.03 M β-GP and 0.2 M CA; Group 3, 0.03 M β-GP and 0.2 M CA. Anodic oxide surface was significantly rougher in comparison to the control untreated titanium surfaces, and the surface roughness and composition of phosphate and oxide increased as the concentration of β-GP was increased. There was no significant difference in the cell viability when cells were cultured on the control or anodized surface using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. Scanning electron micrographs revealed more spread cells on the anodized surface than on the smooth control surface. In conclusion, we suggested that the positive effects of anodized surfaces produced by β-GP and CA on spreading of osteoblast-like cells may be the result of the difference of surface roughness and amount of Ca and P in the oxide layer.

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