Elektrohemijske studije otpornosti na koroziju zlata 18K i termoaktivne legure u veštačkom znoju u prisustvu natrijum hlorida

Autori

  • Thiruvenkadam Gowrani Nallamuthu Gounder Mahalingam College, Department of Chemistry, Pollachi, Tamil Nadu, India Autor
  • Nilavan Anitha St. Antony's College of Arts and Sciences for Women, (Affiliated to Mother Teresa Women's University). Department of Chemistry, Corrosion Research Centre, Kodaikanal, India Autor
  • Shree Balu Nithiya PSNA College of Engineering and Technology, Department of Chemistry, Dindigul, India Autor
  • Gurmeet Singh MV Muthiah Government Arts College for Women, Department of Chemistry, Dindigul, India Autor
  • Hashem Abdulhameed Al Kuwait Institute for Scientific Research, Petroleum Research Centre, Kuwait Autor
  • Susai Rajendran St. Antony's College of Arts and Sciences for Women, (Affiliated to Mother Teresa Women's University). Department of Chemistry, Corrosion Research Centre, Kodaikanal, India + Pondicherry University, Centre for Nanoscience and Technology, Puducherry, India Autor

DOI:

https://doi.org/10.5937/zasmat2301038G

Ključne reči:

otpornost na koroziju, termoaktivna legura, legura zlata 18K, veštački znoj, NaCl, studija polarizacije, spektri AC impedanse

Apstrakt

Otpornost na koroziju termoaktivne legure i legure zlata 18K uronjene u veštački znoj u odsustvu i prisustvu 100ppm NaCl je ispitana polarizacionom studijom i spektrom impedanse naizmenične struje. Prime eno je da se povećava otpornost na koroziju termo aktivne legure, kao i legure zlata 18K uronjene u veštački znoj u prisustvu 100ppm NaCl. Otuda se zaključuje da ljudi koji nose ukrase od ove dve legure ne moraju da brinu o višku natrijum hlorida u svom znoju. Kada se termo aktivna legura potopi u veštački znoj u prisustvu 100ppm NaCl, vrednost otpora linearne polarizacije raste sa 1760283 Ohmcm2 na 9506106 Ohmcm2 ; struja korozije se smanjuje sa 1,845x10-8 na 4,008x10-9 A/cm2 ; vrednost otpora prenosa naelektrisanja raste sa 4884 Ohmcm2 na 12210 Ohmcm2 ; vrednost impedanse se povećava sa 4,367 na 4,8; kapacitivnost dvostrukog sloja se smanjuje sa 1,0442 x10-9 na 4,1769x10-10 F/cm2 , a fazni ugao se povećava sa 48,1° na 66,34°. Kada se legura zlata 18K potopi u veštački znoj u prisustvu 100ppm NaCl, vrednost otpora linearne polarizacije se povećava sa 1079199 Ohmcm2 na 2385141 Ohmcm2 ; struja korozije se smanjuje sa 4,036x10-8 na 0,1966 x 10A/cm2 ; otpor prenosa naelektrisanja raste sa 4291 Ohmcm2 na 48880 Ohmcm 2 vrednost impedanse se povećava sa 4,652 na 5,114; kapacitivnost dvostrukog sloja se smanjuje sa 1,189 x10-9 na 1,0434 x10-10 F/cm2 , a fazni ugao raste sa 61° na 88°.

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2023-03-15

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