Silver Containing Stainless Steel as a New Outlook to Abate Bacterial Adhesion and Microbiologically Influenced Corrosion
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概要
- 論文の詳細を見る
Biofouling and microbiologically influenced corrosion (MIC) are alarming processes of material deterioration. The scenario originates from the attachment of microorganisms as quickly as a material is immersed in a non-sterile environment. Stainless steels, in spite of their wide use in different industries and as appliances and implant materials, do not possess inherent antibacterial properties. To make stainless steel antibacterial and thus to mitigate MIC and bacterial infection was the purpose of this study. AISI type 304 stainless steels containing silver as an alloying element and silver coated are tested for the antibacterial efficacy as well as MIC resistance keeping plain stainless steel as control. Experimental coupons were exposed to a dilute nutrient medium containing Pseudomonas sp., isolated from a corrosive ground water environment. Coupons were exposed for varying duration (maximum 6 days), and bacterial adhesion was monitored by using epifluorescence microscope and quantified with the help of image processing software. In another experiment, free corrosion potential of these materials was monitored for 60 days. The area of bacterial adhesion was found to be significantly lesser in case of silver containing coupons compared to control. Silver alloyed coupons showed better antibacterial effect than the silver-coated coupons. Free corrosion potential showed ennoblement in the case of control coupons, while silver alloyed and silver coated coupons showed substantially lesser fluctuation. SEM observation showed pitting corrosion by 30 days in control coupons, whilst, pits were near nil on silver alloyed and very less on silver coated coupons. The results, thus suggest that silver containing stainless steels possess antibacterial properties and are resistant to MIC as compared to 304 SS. Furthermore, a field study, where the coupons were exposed to a freshwater pond showed that coupons containing silver possessed significant resistance to microfouling build-up until a period of 30 days, suggesting the possibility of using these materials in freshwater environments where microfouling is a persistent problem. As an attempt to investigate the actual damage the silver caused in the bacterium, cell walls and intracellular changes were observed under a transmission electron microscope (TEM).
- 社団法人 日本鉄鋼協会の論文
- 2003-11-15
著者
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Kikuchi Yasushi
Joining And Welding Research Institute Osaka University
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Tohmoto K
Osaka Univ. Osaka Jpn
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SREEKUMARI Kurissery
Joining and Welding Research Institute Osaka University
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NANDAKUMAR Kanavillil
Kawasaki Steel Corporation
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TAKAO Kenji
Kawasaki Steel Corporation
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Sreekumari K
Joining And Welding Research Institute Osaka University
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Sreekumari Kurissery
Joining & Welding Research Institute Osaka University
関連論文
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- Metallurgical and Mechanical Properties of High Nitrogen Austenitic Stainless Steel Friction Welds
- ATTACHMENT OF BACTERIA TO CARBON STEEL WELDMENTS(Materials, Metallurgy & Weldability)
- Effect of Surface Condition on Attachment of Bacteria to Stainless Steel Welds(Materials, Metallurgy & Weldability)
- Adhension Behavior of Bacillus sp. On Stainless Steel Welds Surfaces -Microbially Influenced Corrosion(MIC)of Steel Welds and Joints-
- Corrosion Behavior of Copper and its Welds by Bacteria in Underground Water(Materials, Metallurgy & Weldability)
- INTERNAL FRICTION PEAK BY HYDROGEN IN DUPLEX STAINLESS STEEL AND ITS WELD METAL
- High Nitrogen Stainless Steel as a Preferred Substratum for Bacteria and Other Microfouling Organisms
- Silver Containing Stainless Steel as a New Outlook to Abate Bacterial Adhesion and Microbiologically Influenced Corrosion
- Mitigation of microfoulihg on silver contained stainless steels exposed to freshwater environment
- Weldability of High Nitrogen Stainless Steel
- Antibacterial Metals : A Viable Solution for Bacterial Attachment and Microbiologically Influenced Corrosion
- Adhesion of Pseudomonas sp. on silver incorporated stainless steel with a note on the MIC susceptibility and antibacterial effect