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<p>The sugarcane industry is affected by high costs and unexpected energy losses caused by the loss of efficiency in production lines for repairs and maintenance every year. To satisfy the need for rapid repairs and maintenance, techniques that use welding technology while reducing costs have gained the most popularity. This work presents an investigation into the effects of TIG welding current on the characterization of 304 stainless steel (304 SS) and its connection to <i>Bacillus megaterium</i> (<i>B. megaterium</i>) in microbiologically influenced corrosion (MIC) behavior, as well as the acceleration of corrosion and deterioration of mechanical properties when exposed to a sugarcane solution. As a main genus of the most broad-spectrum microbial species, the effects of the welding current input parameters with a welding current of 70–90 A were studied. It was determined that the widths of the face weld, root weld, weld pool, and HAZ were all enlarged when using a weld metal with a high current input value. In addition, all of the welded metals showed a delta-ferrite microstructure in the austenite zone. Not only was a more dissimilar delta-ferrite matrix produced compared to the low-current-input model, but the higher current input also created dendrites that were longer and spaced further apart within the weld zone. Furthermore, it was found that the mechanical properties and corrosion behavior decreased when the current input increased. However, the primary cause of the discernible variations in the mechanical characteristics and corrosion behavior of the weld metal at 80 A energy input is its superior performance in terms of mechanical and corrosion resistance properties.</p>

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Insight into the acceleration of microbiologically influenced corrosion monitoring via Bacillus megaterium for TIG-welded 304 stainless steels

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Trinet Yingsamphancharoen,
  • Phuri Kalnaowakul

摘要

The sugarcane industry is affected by high costs and unexpected energy losses caused by the loss of efficiency in production lines for repairs and maintenance every year. To satisfy the need for rapid repairs and maintenance, techniques that use welding technology while reducing costs have gained the most popularity. This work presents an investigation into the effects of TIG welding current on the characterization of 304 stainless steel (304 SS) and its connection to Bacillus megaterium (B. megaterium) in microbiologically influenced corrosion (MIC) behavior, as well as the acceleration of corrosion and deterioration of mechanical properties when exposed to a sugarcane solution. As a main genus of the most broad-spectrum microbial species, the effects of the welding current input parameters with a welding current of 70–90 A were studied. It was determined that the widths of the face weld, root weld, weld pool, and HAZ were all enlarged when using a weld metal with a high current input value. In addition, all of the welded metals showed a delta-ferrite microstructure in the austenite zone. Not only was a more dissimilar delta-ferrite matrix produced compared to the low-current-input model, but the higher current input also created dendrites that were longer and spaced further apart within the weld zone. Furthermore, it was found that the mechanical properties and corrosion behavior decreased when the current input increased. However, the primary cause of the discernible variations in the mechanical characteristics and corrosion behavior of the weld metal at 80 A energy input is its superior performance in terms of mechanical and corrosion resistance properties.