The copper-nickel alloys have found extensive application in feedwater heater systems. In general, these materials have excellent resistance to corrosion erosion and stress corrosion cracking. However, service failures, characterized by inter-granular cracking and believed to be the consequence of stress corrosion, have occurred in these alloys. The use of harder tempers to meet the demands of higher operating temperatures and pressures has increased the susceptibility of these materials to stress corrosion cracking.1  Further, the treatment of feedwater with organic amines or hydrazine, which produce ammonia upon breakdown, enhances corrosion and stress corrosion of these materials.

Subject
Materials, Intergranular stress corrosion cracking, Metal surfaces, Oxide layers, Fracture surfaces, Copper alloys, Corrosion attacks, Oxide surfaces, Metals, Copper, Nickel, Tarnish, Stress corrosion cracking
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1974
Association for Materials Protection and Performance (AMPP)
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