Abstract
Abstract An experimental method has been developed for measuring the electrode potential and solution pH at the tip of a growing fatigue crack in BS 4360 5OD steel in seawater. The technique involved insertion of separate 1- to 2-mm diameter glass and reference electrodes in holes drilled to intersect the growing crack. A compact tension specimen was used with the holes drilled in the transverse direction, i.e., perpendicular to the crack front, to minimize perturbation of the local stresses. Measurements of the crack tip pH and potential were made for a range of applied potentials, at varying ΔK (range of the stress intensity factor) and R-value (minimum load/maximum load). At cathodic protection potentials, the pH was alkaline but generalizations about the potential drop were not possible, although the potential in the crack was always in a region of “protection” for the conditions investigated. At the free corrosion and anodic potentials the pH was neutral to slightly alkaline. The potential drop was s...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
