Page Banner

United States Department of Agriculture

Agricultural Research Service

Electropolished Steel Might Positively Repel Bacteria / February 12, 1998 / News from the USDA Agricultural Research Service

Agricultural Research Service
U.S. Department of Agriculture
ARS News and Information Search News and Info Science for Kids Image Gallery Agricultural Research Magazine Publications and Newsletters News Archive News and Info home ARS News and Information
Latest news | Subscribe

Few bacteria on electropolished steel

Electropolished Steel Might Positively Repel Bacteria

By Jill Lee
February 12, 1998

Bacterial film on poultry processing equipment might be prevented by a polishing treatment originally designed to give steel a showroom shine, according to an Agricultural Research Service scientist in Athens, Ga.

Microbiologist Judy Arnold found some potential food- safety benefits in a steel electropolishing process developed by Simmons Engineering Company, a poultry-plant machinery maker in Dallas,Ga. In electropolishing, steel gets an acid bath and then an electrical current is passed through it. In several studies, polishing, sandblasting and grinding have all reduced the buildup of "biofilm"--a matrix of microorganisms that have attached to each other. In Arnold's study, however, electropolishing seemed most effective.

Biofilms can be hard to remove even with chemical cleansers. In a poultry processing plant, biofilms can form if bacteria such as Salmonella move from carcasses to wet steel surfaces. These bacteria can multiply and infect other carcasses--a phenomenon called cross- contamination. Biofilm resistance would cut the need for sanitation chemicals.

Simmons Engineering Company had been concerned about reports linking biofilms and stainless steel. So company vice-president Wayne Austin contacted Arnold after learning she was testing various kinds of steel for resistance to bacterial attachment. She decided to include electropolished steel in her studies. Arnold works in the Poultry Processing and Meat Quality Research Unit, part of ARS' Richard B. Russell Agricultural Research Center in Athens. She suspects that electropolishing changes steel's electrical charge to positive, thus repelling the negatively charged bacteria.

Details are in a story in the February issue of ARS' Agricultural Research magazine. The story is also on the World Wide Web at:

http://www.ars.usda.gov/is/AR/archive/feb98/film0298.htm

Scientific contact: Judy W. Arnold, ARS Richard B. Russell Agricultural Research Center, 950 College Station Rd., Athens, Ga. Phone (706) 546-3515, fax (706) 546-3548, jarnold@negia.net.

Top | News Staff | Photo Staff

E-mail the web team Privacy and other policies Site map About ARS Information Staff Bottom menu

Home | News | Pubs | Magazine | Photos | Sci4Kids | Search
About ARS Info | Site map | Policies | E-mail us

Last Modified: 1/3/2002
Footer Content Back to Top of Page