The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 1997
Filed:
Jul. 28, 1995
Christine M Stuart, Wheaton, IL (US);
Deborah M Rogers, Naperville, IL (US);
James R Van Camp, Glen Ellyn, IL (US);
Michael P Sowinski, Gig Harbor, WA (US);
Nalco Chemical Company, Naperville, IL (US);
Abstract
A method for determining the adequacy of corrosion prevention treatments applied to metal surfaces is disclosed. The method provides a qualitative determination of corrosion detection using inexpensive equipment. Generally, the method encompasses wetting at least a first and a second absorbent patches capable of retaining a liquid corrosive to metal surfaces to be tested with the corrosive liquid to obtain wetted patches and then contacting a portion of a first metal surface to be tested with the first patch under corrosive conditions and contacting a portion of a second metal surface to be tested with the second patch, wherein the second metal surface having the same composition as the first metal surface has been treated with an effective amount of a corrosion prevention treatment and subjecting the second patch in contact with the second metal surface to the same corrosive conditions as the corrosive conditions applied to the first patch in contact with the first metal surface. The method includes removing the first and the second patches from the first and the second metal surfaces; respectively and, treating the first and the second patches with an effective amount of a tetrazolium compound; and, comparing the amount of stain present on the first patch with the amount of stain present on the second patch, wherein the efficacy of the corrosion prevention treatment can be qualitatively determined.