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2022, vol. 63, br. 4, str. 418-429
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Otpornost na koroziju legure SS 18/8 i legure zlata 22K u veštačkom znoju u prisustvu D-glukoze
Corrosion resistance of SS 18/8 alloy and Gold 22 K alloy in artificial sweat in the presence of D-Glucose
Anitha Nilavana, Prathipa Venkatachalamb, Velkannan Veerapandianc, Dhanalakshmi Marimmuthud, Subashini Mary Alexisd, Aishwarya Subramanid, Jenifer Francis Florid, Shree Balu Nithiyad, 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, Dindigul, India bPSNA College of Engineering and Techcnolgy, Department of Chemistry, Dindigul, India cThiagarajar 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, Dindigul, 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 legure SS 18/8 i legure zlata 22K uronjene u veštački znoj u odsustvu i prisustvu 100ppm D-glukoze je ispitana proučavanjem polarizacije i spektrom impedanse naizmenične struje. Primećeno je da se smanjuje otpornost na koroziju legure SS 18/8 i legure zlata 22K uronjene u veštački znoj u prisustvu 100ppm D-glukoze. Otuda se zaključuje da ljudi koji nose ukrase od ove dve legure moraju da brinu o višku D-glukoze u svom znoju. Kada se legura SS 18/8 uroni u veštački znoj u prisustvu 100ppm D-glukoze, vrednost otpora linearne polarizacije opada sa 589308032Ohmcm2 na 87905Ohmcm2; struja korozije raste sa 8,923k10-11A/cm2 na 4,008k10-9A/cm2; vrednost otpora prenosa naelektrisanja se povećava sa 4884 Ohmcm2 na 3,168 k10-7 12210 Ohmcm2; vrednost impedanse se smanjuje sa 8,023 na 4,008; kapacitivnost dvostrukog sloja se povećava sa 8,9099k10-14 F/cm2 na 1,4868k10-9 F/cm2 , a fazni ugao se smanjuje sa 94° na 54°. Kada se legura zlata 22 K potopi u veštački znoj u prisustvu 100 ppm D-glukoze, vrednost otpora linearne polarizacije opada sa 4248438 Ohmcm2 na 236576 Ohmcm2; struja korozije raste sa 8,038 k10-9A/cm2 na 1,546 k10-7A/cm2; otpor prenosa naelektrisanja se smanjuje sa 23680 Ohmcm2 na 6336 Ohmcm2; vrednost impedanse se smanjuje sa 4,647 na 4,567; kapacitivnost dvoslojnog sloja se povećava sa 2,154 k10-10F/cm2 na 8,049k10-10 F/cm2, a fazni ugao se povećava sa 66° na 64°.
Abstract
Corrosion resistance of SS 18/8 alloy and Gold 22 K alloy immersed in artificial sweat in the absence and presence of 100 ppm of D-Glucose has been investigated by polarization study and AC impedance spectra. It is observed that corrosion resistance of SS 18/8 alloy and also Gold 22 K alloy immersed in artificial sweat in the presence of 100 ppm of D-Glucose decreases. Hence it is concluded that people wearing ornaments made of these two alloys need to worry about the excess of D-Glucose in their sweat. When SS 18/8 alloy is immersed in artificial sweat in the presence of 100 ppm of D-Glucose, Linear Polarisation Resistance value decreases from 589308032 Ohmcm2 to 87905 Ohmcm2 ; corrosion current increases from 8.923x10-11A/cm2 to 4.008x10-9 A/cm2 ; charge transfer resistance value increases from 4884 Ohmcm2 to 3.168 x10-7 12210 Ohmcm2 ; impedance value decreases from 8.023 to 4.008; double layer capacitance increases from 8.9099x10-14F/cm2 to 1.4868 x10-9 F/cm2 , and phase angle decreases from 94° to 54°. When Gold 22 K alloy is immersed in artificial sweat in the presence of 100 ppm of DGlucose, Linear Polarisation Resistance value decreases from 4248438 Ohmcm2 to 236576 Ohmcm2 ; corrosion current increases from 8.038 x10-9A/cm2 to 1.546 x10-7A/cm2 ; charge transfer resistance decreases from 23680 Ohmcm2 to 6336 Ohmcm2 ; impedance value decreases from 4.647to 4.567; double layer capacitance increases from 2.154 x10-10 F/cm2 to 8.049x10-10 F/cm2 , and phase angle increases from 66° to 64°.
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