No significant difference was found in the relative cleanability of Nos. 2B, 3, 4, and 7 stainless steel finishes as measured by bacteriological tests. Therefore, it can be concluded that from a bacteriological cleanability stand-point, based on the conditions of this study, the selection of a stainless steel finish from among those used in these studies for a farm bulk tank or any comparable piece of equipment should be based on factors other than bacteriological cleanability.

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Author notes

1Contribution of the Michigan Agricultural Experiment Station No. 2647

2Aided in part by the Committee of Stainless Steel Producers, American Iron and Steel Institute, and the National Association of Dairy Equipment Manufacturers.