title: The effect of absorbed hydrogen on the dissolution of steel.
abstract: 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.
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Thomas
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia; Chimie ParisTech, Ecole Nationale Supurieure de Chimie de Paris, Paris 75005, France.
authors.forename: Noemie
authors.initials: N
authors.lastname: Ott
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia; Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA.
authors.forename: Rebecca F
authors.initials: RF
authors.lastname: Schaller
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
authors.forename: Jodie A
authors.initials: JA
authors.lastname: Yuwono
authors.affiliation: Chimie ParisTech, Ecole Nationale Supurieure de Chimie de Paris, Paris 75005, France.
authors.forename: Polina
authors.initials: P
authors.lastname: Volovitch
authors.affiliation: GE Global Research, Bangalore 560066, India.
authors.forename: Guruprasad
authors.initials: G
authors.lastname: Sundararajan
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
authors.forename: Nikhil V
authors.initials: NV
authors.lastname: Medhekar
authors.affiliation: Chimie ParisTech, Ecole Nationale Supurieure de Chimie de Paris, Paris 75005, France.
authors.forename: Kevin
authors.initials: K
authors.lastname: Ogle
authors.affiliation: Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA.
authors.forename: John R
authors.initials: JR
authors.lastname: Scully
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
authors.forename: Nick
authors.initials: N
authors.lastname: Birbilis
keywords: Engineering; Materials Science