{'fraction_non_alphanumeric': 0.015032679738562092, 'fraction_numerical': 0.011111111111111112, 'mean_word_length': 5.542735042735043, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Biofilm adhesion and microbially influenced corrosion of SUS304 welds exposed to dam water

The authors have previously investigated and analyzed cases of microbially influenced corrosion (referred to below as MIC) in stainless steels exposed to mild fresh water environments such as groundwater, dam water, river water and industrial water. 2 Laboratory-based MIC simulations of case study water have also been conducted together with research on the characteristics of corrosionproducing bacteria and their underlying corrosion mechanisms. Laboratory-based MIC simulations, however, show that MIC, even when modelled in this way, holds many obscure aspects relating to corrosion rate and corrosion initiation from the electrochemical perspective. Stainless steel welds are more readily susceptible to MIC than base metals, a feature clearly evident from numerous case studies and the results of a MIC-related questionnaire conducted in 2004 by the Corrosion Subcommittee of the Japan Society of Corrosion Engineering Materials and Equipment Committee. This paper describes exposure immersion tests of SUS304 base metal and welded joints in a North Kyushu dammed storage lake supplying raw water through a SUS304 pipeline that sustained MIC-induced leakage together with investigations of the adhesion behaviour of biofilms during exposure for durations up to 550 days, the time variation of the natural corrosion potential (mV vs SSE, referred to below as Esp), and whether or not MIC corrosion pits are present in test coupons.