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| EFFECT OF cL- ON IRON CORROSION IN H2S-CONTAINING STRONG ACIDIC SOLUTIONS |
| Lijing Yan;; |
| 中科院金属所金属腐蚀与防护国家重点实验室 |
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Abstract The effect of Cl- on iron corrosion in 0.5mol/L and 0.005mol/L H2SO4 solutions containing H2S has been studied by electrochemical potentiodynamic oolarization and impedance measurements.The results show that Cl- ion can simultaneouly inhibit the anodic and cathodic reaction of iron in 0.5mol /L H2SO4 containing H2S. For the inhibition action of Cl- a critical concentration is observed and the critical point is 1mol/L. In 0.005mol/L H2SO4 containing H2S,small amount of Cl- can increase the protective property of the corrosion product on iron surface,but weaken the adhesive force of the corrosion product,however,arge amount of Cl-retard the formation of the corrosion product.
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Received: 19 July 2005
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Corresponding Authors:
Lijing Yan
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