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Amorphous alloys resistant to corrosion in artifical saliva solution (CROSBI ID 101415)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Kwokal, Ana ; Metikoš-Huković, Mirjana ; Radić, Nikola ; Poljak-Guberina, Renata ; Ćatović, Adnan Amorphous alloys resistant to corrosion in artifical saliva solution // Journal of materials science. Materials in medicine, 14 (2003), 605-610-x

Podaci o odgovornosti

Kwokal, Ana ; Metikoš-Huković, Mirjana ; Radić, Nikola ; Poljak-Guberina, Renata ; Ćatović, Adnan

engleski

Amorphous alloys resistant to corrosion in artifical saliva solution

The tailoring of new corrosion-resistant alloys with specific properties has recently been performed mostly by the sputter deposition technique. The aim of this work was to investigate corrosion resistance of aluminum-tungsten (Al-W) amorphous alloys in artificial saliva solution, pH = 5.5, based on the electrochemical methods of cyclic voltammetry and linear polarization. Thin alloy films were prepared on a sapphire substrate by magnetron codeposition. Completely amorphous films were obtained in the Al80W20-Al67W33 composition range. Amorphous Al-W alloys exhibit very high corrosion resistance due to their homogeneous single-phase nature. The passive films spontaneously formed at their surface are uniform with characteristics of an insulator film and prevent corrosion progression in the bulk in a very demanding oral environment. The mechanism of increasing resistivity of Al-W alloys to pitting corrosion and generalized corrosion has been discussed in the view of increasing tungsten content in the alloy. Considering these exceptional corrosion properties and microhardness which falls in the range 7.5 plus-minus 1.6 Pa, Al-W alloys represent promising materials for dental applications.

Al-W alloys; artificial saliva; metallic biomaterials; amorphous alloys; magnetron cosputtering; corrosion; saliva solution

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Podaci o izdanju

14

2003.

605-610-x

objavljeno

0957-4530

Povezanost rada

Fizika, Kemija

Indeksiranost