This study explores how various Thiobacillus strains influence the corrosion of radioactive waste drum materials and the migration of corroded products. Five strains of Thiobacillus spp. and two radioactive waste drum materials, the cold-rolled carbon steel (C-RCS) and hot-rolled carbon steel (H-RCS), were used. The physiological properties and the morphology of the tested Thiobacillus strains were investigated. The effects of Thiobacillus strains on the corrosion of carbon steel drum materials and the migration of corroded products were examined by measurements of weight loss, electrochemical analysis, and inductively coupled plasma-atomic emission spectrometry. Under microscopic observation, numerous bacteria were present in corroded products and the migration of the corroded products was accelerated by Thiobacillus strains. Results indicated that Thiobacillus strains increased the electrochemical parameters. For the same bacteria, the icorr of H-RCS exceeded that of C-RCS. Of the five tested strains, T. thiooxidans had the greatest effect on the migration of corroded products of RCS; T. thioparus was the weakest. The weight loss of RCS in the T. ferrooxidans culture exceeded that in the T. thiooxidans culture. Conclusively, the Thiobacillus strains promoted the corrosion of radioactive waste drum materials.
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机译：这项研究探索了各种变形杆菌如何影响放射性废料桶材料的腐蚀和腐蚀产物的迁移。五株硫杆菌属。使用了两种放射性废料桶材料，即冷轧碳钢（C-RCS）和热轧碳钢（H-RCS）。研究了所测试的硫杆菌属菌株的生理特性和形态。通过测量失重，电化学分析和电感耦合等离子体原子发射光谱法，研究了硫杆菌属菌株对碳钢桶材料腐蚀和腐蚀产物迁移的影响。在显微镜下观察，腐蚀产物中存在许多细菌，并且硫杆菌菌株加速了腐蚀产物的迁移。结果表明，硫杆菌属菌株增加了电化学参数。对于相同的细菌，H-RCS的icorr超过了C-RCS的icorr。在所测试的五种菌株中，硫代衣原体对RCS腐蚀产物的迁移具有最大的影响。 T. thioparus是最弱的。在氧化铁球菌培养物中RCS的重量损失超过在氧化硫球菌培养物中的RCS的重量损失。总之，硫杆菌属菌株促进了放射性废料桶材料的腐蚀。
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