Elektrokemijsko ispitivanje stabilnosti pasivnog stanja i korozijske otpornosti supermartenzitnog nehrđajućeg čelika

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Lasek, S. ; Střílková, L. ; Číhal, V. ; Blahetová, M. (2010)
  • Publisher: Croatian Metallurgical Society (CMS)
  • Journal: Metalurgija, volume 49, issue 1 (issn: 0543-5846, eissn: 1334-2576)
  • Subject: toplinska obrada | polarizacijsko ispitivanje | nehrdajući martenzitni čelik | martensitic stainless steel; heat treatment; polarization test; corrosion properties | martensitic stainless steel | nehrđajući martenzitni čelik; toplinska obrada; polarizacijsko ispitivanje; korozijska svojstva | corrosion properties | heat treatment | polarization test | korozijska svojstva

On low interstitial - supermartensitic stainless steels (X1CrNiMo 12-5-1, X2CrNiMo 13-6-2, X1CrNiMo 12-6-2) the electrochemical potentiodynamic polarization tests were carried out and the passive state stability and localized corrosion resistance were compared and evaluated. The effect of quenching and tempering as well as the changes in microstructure on polarisation curves and corrosion properties at room temperature were established. Small differences in chemical composition of steels were also registered on their corrosion parameters changes and resistance. Rad prikazuje usporedbu i procjenu stabilnosti pasivnog stanja i lokalnu otpornost koroziji temeljem ispitivanja elektrokemijske potenciodinamičke polarizacije nisko-intersticijskih supermartenzitnih nehrdajućih čelika (X1CrNiMo 12-5-1, X2CrNiMo 13-6-2, X1CrNiMo 12-6-2). Utvrdeni su utjecaj poboljšavanja čelika i mikrostrukturne promjene na polarizacijskim krivuljama uzoraka te korozijska svojstva pri sobnoj temperaturi. Uočena je i povezanost malih odstupanja kemijskog sastava čelika s promjenom korozijskih parametera i korozijskom otpornošću.
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