The conditions leading to failure, under cathodic polarization, of high strength wires used to prestress concrete tubes, have been studied. A mechanism of nucleation and growth of microcracks in areas charged with hydrogen has been evidenced. Nucleation of cracks is rapid with a high current density and a lower pH, conditions that can be approached when excessive cathodic protection is applied to wires and the pH of the concrete decreases below the natural basic values by elution of OH-1 ions or by action of acidic solutions. © 1987.
Hydrogen embrittlement of high strength steel wires under cathodic polarization / M., Arpaia; P. G., Orsini; Pernice, Pasquale. - In: MATERIALS CHEMISTRY AND PHYSICS. - ISSN 0254-0584. - STAMPA. - 16:(1987), pp. 501-509.
Hydrogen embrittlement of high strength steel wires under cathodic polarization
PERNICE, PASQUALE
1987
Abstract
The conditions leading to failure, under cathodic polarization, of high strength wires used to prestress concrete tubes, have been studied. A mechanism of nucleation and growth of microcracks in areas charged with hydrogen has been evidenced. Nucleation of cracks is rapid with a high current density and a lower pH, conditions that can be approached when excessive cathodic protection is applied to wires and the pH of the concrete decreases below the natural basic values by elution of OH-1 ions or by action of acidic solutions. © 1987.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
