Investigation of corrosion and container integrity in metal food containers using scanning electron microscopy-X-ray microanalysis.
Scanning electron microscopy and x-ray microanalysis were used to investigate microleakage, two incidences of loss of coating integrity, filiform corrosion, and sulfide black corrosion in enamel-lined metal food containers. Microleakage developed in a canned cheese sauce at the side seam weld and was traced to a hot weld and a cold weld defect. An enamel-blistering problem developed in an aseptically processed milk-based product when the tinplate was heated above its melting point; the tin melted under the enamel coating, causing the blistering. An enamel-blistering problem, due to silicon contamination of the metal surface prior to enameling, developed on the bottom of a two-piece can that contained a chicken-based product. A sulfide black problem developed in canned clams, caused by scratches in the coating that were introduced during can manufacturing. A filiform corrosion problem developed on the outside of the easy score line of enameled tinplate lids with a light tin coating 0.08 microns thick.
Charbonneau
J E
JE
National Food Processors Association, Washington, DC 20005-3305, USA.
D000818:Animals; D049872:Bivalvia; D002611:Cheese; D002645:Chickens; D003343:Corrosion; D004577:Electron Probe Microanalysis / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D018857:Food Packaging; D013232:Steel / Q000737:chemistry*; D013440:Sulfides / Q000032:analysis; D014001:Tin / Q000737:chemistry*
D013440:Sulfides; D013232:Steel; D014001:Tin