Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
The effect of absorbed hydrogen on the dissolution of steel
oleh: Sebastian Thomas, Noemie Ott, Rebecca F. Schaller, Jodie A. Yuwono, Polina Volovitch, Guruprasad Sundararajan, Nikhil V. Medhekar, Kevin Ogle, John R. Scully, Nick Birbilis
Format: | Article |
---|---|
Diterbitkan: | Elsevier 2016-12-01 |
Deskripsi
Atomic hydrogen (H) was introduced into steel (AISI 1018 mild steel) by controlled cathodic pre-charging. The resultant steel sample, comprising about 1 ppmw diffusible H, and a reference uncharged sample, were studied using atomic emission spectroelectrochemistry (AESEC). AESEC involved potentiodynamic polarisation in a flowing non-passivating electrolyte (0.6 M NaCl, pH 1.95) with real time reconciliation of metal dissolution using on-line inductively coupled plasma-atomic emission spectroscopy (ICP-OES). The presence of absorbed H was shown to significantly increase anodic Fe dissolution, as evidenced by the enhanced detection of Fe2+ ions by ICP-OES. We discuss this important finding in the context of previously proposed mechanisms for H-effects on the corrosion of steels.