Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cathodic protection of UNS C71500 heat exchanger tubes in sulphide polluted Arabian Gulf sea water
The sacrificial cathodic protection method can be used to prolong the service life of sea water heat exchanger tubes by minimising the general and localised types of corrosion that might occur on the surfaces of such tubes. A laboratory investigation using a specially designed circulating test rig has been undertaken to study the feasibility of achieving complete cathodic protection of UNS C71500 (70wt-%Cu-30wt-%Ni) heat exchanger tubes in sea water applications by means of sacrificial carbon steel anodes. The results have indicated that the galvanic current distribution covered the entire 6 m length of the tube. The presence of sulphide ions tended to shift the galvanic potentials of UNS C71500 alloy tubes to less active potentials. The galvanic current distribution covered all 1 m segments to tube. The galvanic current required for cathodic protection was greater in the presence of 5 and 10 ppm dissolved sulphide ions than in unpolluted sea water. The presence of sulphide ions as pollutants in sea water affects the formation of the protective films that normally form on Cu-Ni alloys.
Cathodic protection of UNS C71500 heat exchanger tubes in sulphide polluted Arabian Gulf sea water
The sacrificial cathodic protection method can be used to prolong the service life of sea water heat exchanger tubes by minimising the general and localised types of corrosion that might occur on the surfaces of such tubes. A laboratory investigation using a specially designed circulating test rig has been undertaken to study the feasibility of achieving complete cathodic protection of UNS C71500 (70wt-%Cu-30wt-%Ni) heat exchanger tubes in sea water applications by means of sacrificial carbon steel anodes. The results have indicated that the galvanic current distribution covered the entire 6 m length of the tube. The presence of sulphide ions tended to shift the galvanic potentials of UNS C71500 alloy tubes to less active potentials. The galvanic current distribution covered all 1 m segments to tube. The galvanic current required for cathodic protection was greater in the presence of 5 and 10 ppm dissolved sulphide ions than in unpolluted sea water. The presence of sulphide ions as pollutants in sea water affects the formation of the protective films that normally form on Cu-Ni alloys.
Cathodic protection of UNS C71500 heat exchanger tubes in sulphide polluted Arabian Gulf sea water
Kathodischer Schutz von Wärmetetauscherrohren aus UNS C71500 in mit Sulfid verunreinigtem Seewasser des Persischen Golfes
Carew, J.A. (Autor:in) / Al-Hashem, A. (Autor:in) / Al-Sayegh, A. (Autor:in)
British Corrosion Journal ; 35 ; 115-119
2000
5 Seiten, 7 Bilder, 1 Tabelle, 12 Quellen
Aufsatz (Zeitschrift)
Englisch
Cathodic protection of UNS C71500 heat exchanger tubes in sulphide polluted Arabian Gulf sea water
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