Uticaj uree i glukoze na otpornost legure zlata 21K na koroziju u prisustvu veštačkog znoja
DOI:
https://doi.org/10.5937/zasmat2203341UKljučne reči:
otpornost na koroziju, termoaktivna legura, legura zlata 21K, veštački znoj, studija polarizacije, spektri impedanse naizmenične strujeApstrakt
Otpornost na koroziju legure zlata 21K uronjene u veštački znoj u odsustvu i prisustvu 100 ppm uree i 100ppm D-glukoze je ispitana proučavanjem polarizacije i spektara impedanse naizmenične struje. Prime eno je da se povećava otpornost na koroziju legure zlata 21K uronjene u veštački znoj u prisustvu 100 ppm uree/D-glukoze. Otuda se zaključuje da ljudi koji nose ukrase od legure zlata 21K ne moraju da brinu o višku uree -glukoze u svom znoju. Kada se legura zlata 21K potopi u veštački znoj u prisustvu 100 ppm uree vrednost otpora linearne polarizacije se povećava sa 103389 Ohmcm2 na 123437Ohmcm2 ; struja korozije opada sa 4,036 k10-7A/cm2 na 3,308 k10-7A/cm2 vrednost otpora prenosa naelektrisanja se povećava sa 10490 Ohmcm2 na 14070 Ohmcm2 vrednost impedanse se povećava sa 4,253 na 4,324; kapacitivnost dvostrukog sloja se smanjuje sa 4,862k10-10 F/cm2 na 3,625k10-10F/cm2 a fazni ugao se povećava sa 38,91° na 70 14°. Kada se legura zlata 21K potopi u veštački znoj u prisustvu 100ppm -glukoze vrednost otpora linearne polarizacije se povećava sa 103389 Ohmcm2 na 4817257Ohmcm2 ; struja korozije se smanjuje sa 4,036 k10-7A/cm2 na 0,161k10-7A/cm2 ; otpor prenosa naelektrisanja se povećava sa 10490 Ohmcm2 na 33300 Ohmcm2 vrednost impedanse se povećava sa 4,253 na 4,977; kapacitivnost dvoslojnog sloja se smanjuje sa 4,862k10-10 F/cm2 na 1,5315k10-10 F/cm2 a fazni ugao se povećava sa 38 91° na 79 74.Reference
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