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2022, vol. 63, br. 4, str. 430-436
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Otpornost na koroziju ortodontske žice od legure nikl-titanijuma u veštačkoj pljuvački u prisustvu Kopiko bombona
Corrosion resistance of orthodontic wire made of nickel-titanium alloy in artificial saliva in the presence of Kopiko candy
Anitha Nilavana, Narendran Nellainayagamb, Velkannan Veerapandianc, Nandhini Gurumoorthyd, Jenifer Francis Florid, Subashini Mary Alexisd, Aishwarya Subramanid, Nithiya Shree Balud, Singh Gurmeete, Al-Hashem Abdulhameedf, Rajendran Susaig, Lačnjevac Časlavh
aSt. Antony's College of Arts and Sciences for Women, Corrosion Research Centre, Department of Chemistry, Chennai, India + Mother Teresa Women's University, Kodaikanal, India bPSNA College of Engineering and Technology, Department of Chemistry, Dindigul, India cAnna University, Thiagarajar College of Engineering, Department of Chemistry, Thiruparankundram, Madurai, Tamil Nadu, India dMV Muthiah Government Arts College for Women, Dindigul, India ePondicherry University, Puducherry, India fKuwait Institute for Scientific Research, Petroleum Research Centre, Kuwait City, Kuwait gSt. Antony's College of Arts and Sciences for Women, Corrosion Research Centre, Department of Chemistry, Chennai, India + Mother Teresa Women's University, Kodaikanal, India + Pondicherry University, Centre for Nanoscience and Technology, Puducherry, India hUniverzitet u Beogradu, Poljoprivredni fakultet, Srbija
e-adresa: susairajendran@gmail.com
Sažetak
Otpornost na koroziju ortodontske žice, napravljene od legure Ni-Ti, uronjene u veštačku pljuvačku u odsustvu i prisustvu 500 ppm Kopiko bombona je ispitana polarizacionom studijom i spektrom impedanse naizmenične struje. Primećeno je da se otpornost na koroziju Ni-Ti legure potopljene u veštačku pljuvačku u prisustvu 500 ppm Kopiko bombona povećava. Otuda se zaključuje, da ljudi koji su sadrze ortodontsku žicu u ustima od Ni-Ti legure ne moraju da brinu o uzimanju Kopiko bombona oralno. Kada se legura Ni-Ti potopi u veštačku pljuvačku u prisustvu 500 ppm Kopiko bombona, vrednost otpora linearne polarizacije se povećava sa 347978 Ohmcm2 na 415003 Ohmcm2 ; struja korozije se smanjuje sa 1,346 k10-7 A/cm2 na 1,105 k10-7 A/cm2 ; vrednost otpora prenosa naelektrisanja se povećava sa 31945 Ohmcm2 na 44357 Ohmcm2; vrednost impedanse se povećava sa 4,649 na 4,819; kapacitivnost dvostrukog sloja se smanjuje sa 1,596k10-10 F/cm2 na 1,150k10-10 F/cm2 , a fazni ugao se povećava sa 39,63° na 50°.
Abstract
Corrosion resistance of an orthodontic wire made of Ni-Ti alloy immersed in artificial saliva in the absence and presence of 500 ppm of Kopiko candy has been investigated by polarization study and AC impedance spectra. It is observed that corrosion resistance of Ni-Ti alloy immersed in artificial saliva in the presence of 500 ppm of Kopiko candy increases. Hence it is concluded that people clipped with orthodontic wire made of Ni-Ti alloy need not worry about taking Kopiko candy orally. When Ni-Ti alloy is immersed in artificial saliva in the presence of 500 ppm of Kopiko candy, Linear Polarization Resistance value increases from 347978 Ohmcm2 to 415003 Ohmcm2 ; corrosion current decreases from 1.346 x10-7A/cm2 to 1.105 x10-7A/cm2 ; charge transfer resistance value increases from 31945 Ohmcm2 to 44357 Ohmcm2 ; impedance value increases from 4.649to 4.819; double layer capacitance decreases from 1.596x10-10F/cm2 to 1.150 x10-10F/cm2 , and phase angle increases from 39.63° to 50°.
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