Several metallic materials are employed in the manufacture of solenoid valve for domestic heating systems. However, galvanic corrosion could be a problem when two different materials are electrically coupled to each other in the presence of electrolytes. To avoid this, several types of protective coating have been developed. In this work, the galvanic corrosion between brass (both chromate coated and un-coated) and three kinds of metals, AISI 430, galvanized steel and aluminum alloy (both passivated and un-passivated), were studied in aggressive solutions (3.5 % NaCl), using a potentiostat in zero resistance ammeter mode (ZRA). Further ZRA tests were conducted using an external potential of 0.7V DC.
Effect of chromate conversion coating on the galvanic coupling between brass and different alloys in 3.5% NaCl
Pezzato L.;
2023
Abstract
Several metallic materials are employed in the manufacture of solenoid valve for domestic heating systems. However, galvanic corrosion could be a problem when two different materials are electrically coupled to each other in the presence of electrolytes. To avoid this, several types of protective coating have been developed. In this work, the galvanic corrosion between brass (both chromate coated and un-coated) and three kinds of metals, AISI 430, galvanized steel and aluminum alloy (both passivated and un-passivated), were studied in aggressive solutions (3.5 % NaCl), using a potentiostat in zero resistance ammeter mode (ZRA). Further ZRA tests were conducted using an external potential of 0.7V DC.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
