Abstract
The anodic and cathodic behaviour of pure Fe, five different steels of C-content ranging from 0·15 to 1·38 %, cast Fe containing 3·2 % C and 18-8 stainless steel was studied in 0·1N borax solution in absence and presence of Versene. The anodic behaviour of the steels investigated is markedly influenced by the nature of the separate phases in the Fe-C system and by Versene. In addition to pure Fe and 18-8 stainless steel, steel having a composition corresponding to the eutectoid structure shows the highest corrosion resistance. In presence of Versene and at low c.d.s ≤ 10μA/cm 2, the potential remains constant at values corresponding approximately to the formation of Fe(OH) 2. Increase of c.d. leads to passivity without manifesting the intermediate step obtained in absence of Versene.
Published Version
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