Showing papers in "Materials protection in 1972"

Tests indicate the ag/ag cl electrode is ideal reference cell in seawater

Abstract: The silver/silver chloride (Ag/AgCl) electrode has been widely used as a practical reference electrode in sea water for the past 20 years. However, private inquiries to the authors indicate a continuing distrust of the reliability of this electrode among corrosion engineers. These questions seem to be mainly concerned with the position in the electromotive series of the electrode, with the reliability of the electrode, and with the effect of dilution on the accuracy of measurements made with Ag/AgCl electrodes in brackish water. In addition to these reservations as to the reliability of Ag/AgCl electrodes, there has been the question of their theoretical behavior in sea water. Thus, a study was undertaken to determine whether the potential of of the electrode was determined solely by the chloride in the sea water and whether the electrode acted as a reversible half cell in sea water; that is, whether the potential of the electrode could be calculated from the activity coefficients of the chloride ion concentration in sea water and in diluted sea water. This phase of the study also provided an opportunity to tie in the potential of the Ag/AgCl electrode with the extensive data based on the chemical and physical properties of sea water developed by oceanographers.

Practical interference current testing on underground metallic structures

Abstract: STRAY CURRENTS OF BOTH STATIC AND DYNAMIC CHARACTERISTICS ARE DEALT WITH. CORROSION CONTROL PERSONNEL DO NOT ENCOUNTER INTERFERENCE PROBLEMS REGULARLY SO THAT, PRIOR TO INTERFERENCE TESTING, THEY OFTEN MUST REFRESH THEMSELVES ON TESTING METHODS. A GUIDE, IN DIGEST FORM, THAT CAN BE FOLLOWED BY BOTH EXPERIENCED AND INEXPERIENCED CORROSION CONTROL PERSONNEL IS GIVEN. THE EXAMPLES WHICH ARE SET FORTH MAY BE ADAPTED SINGULARLY OR IN COMBINATION TO SOLVE NEARLY EVERY INTERFERENCE PROBLEM WHICH ARE ENCOUNTERED IN PRACTICE. /AUTHOR/

Inhibition of mild steel corrosion by organic polymers

Abstract: This paper discusses the effectiveness of polymeric and monomeric inhibitors and coatings which were gravimetrically tested on mild steel specimens in the environments of 1.0N HCl and aerated artificial sea water. Ionizing irradiation for crosslinking and grafting inhibitors and coatings was chosen to enhance inhibition.