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| Effect of Anion on Pitting Corrosion of the 304 Stainless Steel in the Kraft Pulping |
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| DOI：10.11981/j.issn.1000-6842.2011.02.25 |
| Key Words:kraft pulping; stainless steal; pitting corrosion; anion |
| Author Name | Affiliation | | 王淑梅 | 南京林业大学江苏省制浆造纸科学与技术重点实验室，江苏南京，210037 | | 戴红旗 | 南京林业大学江苏省制浆造纸科学与技术重点实验室，江苏南京，210037 | | 方 莹 | 南京林业大学江苏省制浆造纸科学与技术重点实验室，江苏南京，210037 |
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| Abstract: |
| The effect of anion on the pitting corrosion of 304 stainless steel in kraft pulping was investigated with potentiodynamic polarization curve. The results showed that chloridion and sulfide in medium are corrosive, which can destroy the passive film of stainless steel and promote the formation and growth of the pits; sulfuric acid radical ion and carbonate acid radical ion can prevent the corrosion and the formation of pits of stainless steel, especially when the concentration of carbonate acid radical ion reaches 0.094 mol/L and sulfuric acid radical ion reaches 0.014 mol/L; the pitting phenomenon of 304 stainless steel is easier to occur in the simulative cooking liquid, when temperature increases. |
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