Effect of plasma nitriding on AISI 304 stainless steel surface electrochemical properties and hydrogen evolution rate

2018 ◽  
Author(s):  
Shrok Aliami ◽  
Mutawer Redah
Keyword(s):  
Stainless Steel ◽  
Electrochemical Properties ◽  
Hydrogen Evolution ◽  
Steel Surface ◽  
Plasma Nitriding ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Hydrogen Evolution Rate

scholarly journals Silver implantation on AISI 304 stainless steel surface using low-energy doses and the antimicrobial effect against Salmonella Enteritidis and Listeria monocytogenes

2020 ◽  
Vol 5 (5) ◽  
pp. 244-251
Author(s):  
Caroline Isabel Kothe ◽  
◽  
Regina Zilio ◽  
Tatiana Pacheco Soares Zamboni ◽  
Cesar Aguzzoli ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Foodborne Pathogens ◽  
Salmonella Enteritidis ◽  
Steel Surface ◽  
Silver Ions ◽  
Low Energy ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304

Silver has antimicrobial properties and when implemented on the stainless steel surface can inactivate microorganisms and consequently prevent biofilm formation and cross-contamination of food. Therefore, in this study we evaluated the antibacterial properties of silver ions implanted on AISI 304 stainless steel surfaces using low-energy doses against Salmonella Enteritidis and Listeria monocytogenes, two foodborne pathogens. AISI 304 stainless steel coupons were treated using energy of 2 and 4 keV for silver implantation and simulations were performed to estimate its dose distribution. Coupons containing silver ions were contaminated with S. Enteritidis and L. monocytogenes and incubated at 25 °C for 1 and 24 h. Results demonstrated that 4 keV treatment were able to reduce S. Enteritidis, but not L. monocytogenes. However, the 2 keV treatment showed significant reductions of both pathogens and the depth profiles of surfaces treated with 2 keV of energy showed 3.5×1016 silver atoms/cm² implanted in up to 5 nm from the stainless steel surface. Silver implanted on stainless steel using low-energy doses demonstrated antimicrobial properties against foodborne pathogens and this strategy can be used to reduce adhered cells and biofilm formation in food industries. Keywords: bacterial adhesion, biofilm, foodborne pathogens, ion implantation, silver ions

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