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:
Aug. 26, 1997
Filed:
Feb. 14, 1996
Applicant:
Inventors:
Anthony R Pitochelli, Kingwood, TX (US);
Lawrence M Cenegy, The Woodlands, TX (US);
James D Watson, Houston, TX (US);
John G Garcia, Jr, Stafford, TX (US);
Assignee:
Nalco/Exxon Energy Chemicals, L.P., Sugarland, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427-8 ; 427239 ; 427435 ; 4274431 ;
Abstract
Corrosion by water of mild steel pipe is inhibited by the controlled addition of NaHCO.sub.3 to the water (containing calcium ions) in sufficient amounts to induce corrosion and form scale. The scale deposits on the pipe at the corrosion sites form a protective film thereon. The addition of the NaHCO.sub.3 is controlled by the use of corrosion electrode probes placed in the pipe.