ORALS
SESSION:
CorrosionWedPM2-R10
| 2nd Intl Symp. on Corrosion for Sustainable Development |
| Wed. 29 Nov. 2023 / Room: Boardroom | |
| Session Chairs: Raman Singh; Session Monitor: TBA |
16:25: [CorrosionWedPM210] OL
OVERVIEW OF THE UNIFICATION OF THE THEORIES FOR LOCALIZED AND GENERAL CORROSION Digby Macdonald1 ;
1U. of California at Berkeley, Berkeley, United States;
Paper Id: 127
[Abstract] The theories for localized corrosion, such s pitting corrosion, stress corrosion cracking, corrosion fatigue, flow-assisted corrosion, and galvanic corrosion, among other mechanisms and general corrosion have tended to develop independently, many on an ad hoc basis. In this paper a unified theory is resented in which all known forms of localized and general corrosion are accommodated under s singly mathematical framework. The physicoelectrochemical factors that lead to the development of one form of attack over anther are identified and are illustrated by reference to specific examples. Knowing these factors allows us to predict the form of attacks (2) that might be expected for any given metal/alloy under any given set of environmental conditions.
SESSION:
CorrosionWedPM2-R10
| 2nd Intl Symp. on Corrosion for Sustainable Development |
| Wed. 29 Nov. 2023 / Room: Boardroom | |
| Session Chairs: Raman Singh; Session Monitor: TBA |
16:50: [CorrosionWedPM211] OL
OVERVIEW OF THE THEORIES OF STRESS CORROSION CRACKING AND CORROSION FATIGUE Digby Macdonald1 ;
1U. of California at Berkeley, Berkeley, United States;
Paper Id: 128
[Abstract] Great advances have been made in recent years in developing viable theories for stress corrosion cracking (SCC) and corrosion fatigue (CF), particularly with the advent of the Coupled Environment Fracture Model (CEFM) and the Coupled Environment Corrosion Fatigue Model (CECFM), respectfully. Both models are highly deterministic in that the model predictions are constrained by the natural laws, specially by the conservation of charge and mass, Faraday’s law of the equivalence of mass/charge, and by the traditional laws of chemistry. The outcome is that the models can predict the crack growth rate (CGR) under constant loading and under fatigue conditions as accurately as can be measured. The illustration of the application of the models to predicted SCC and CF damage in water-cooled nuclear power rector coolant systems is presented.
