Anisotropic corrosion of iron in pH 1 sulphuric acid

作者：Fushimi Koji^*; Miyamoto Kazunari; Konno Hidetaka

来源：Electrochimica Acta, 2010, 55(24): 7322-7327.

DOI：10.1016/j.electacta.2010.07.044

• Anisotropic corrosion
• Single crystal iron
• Orientation
• Hydrogen evolution reaction
• Covalent bonding

Anisotropic corrosion behaviour of a single grain of pure iron in 0.05 mol dm(-3) sulphuric acid (pH 1) was investigated by a simple polarization technique Both corrosion potential and corrosion current were found to be dependent on crystallographic orientation of the iron grain. A high corrosion current flowed on a grain showing a relatively noble corrosion potential. although both cathodic and anodic Tafel slopes were independent of the orientation It was shown that cathodic hydrogen evolution reaction (HER) governed the corrosion reaction on the iron grain.

• 出版日期2010-10-1