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| 1 | Galvanic Interactions of HE15 / MDN138 & HE15 / MDN250 Alloys in Natural Seawater显示文摘HE15 is a heat treatable high strength alloy with excellent machinability find wide applications in aerospace and defence industries. In view of their excellent mechanical properties, workability, machinability, heat treatment characteristics and good resistance to general and stress corrosion cracking, MDN138 & MDN250 have been widely used in petrochemical, nuclear and aerospace industries. The galvanic corrosion behaviour of the metal combinations HE15 / MDN138 and HE15 / MDN250, with 1:1 area ratio, has been studied in natural seawater using the open well facility of CECRI's Offshore Platform at Tuticorin for a year. The open circuit potentials of MDN138, MDN250 and HE15 of the individual metal, the galvanic potential and galvanic current of the couples HE15 / MDN138 and HE15 / MDN250 were periodically monitored throughout the study period. The calcareous deposits on MDN138 and MDN250 in galvanic contact with HE15 were analyzed using XRD. The electrochemical behaviors of MDN138, MDN250 and HE15 in seawater have been studied using an electrochemical work station. The surface characteristics of MDN138 and MDN250 in galvanic contact with HE15 have been examined with scanning electron microscope. The results of the study reveal that HE15 offered required amount of protection to MDN138 & MDN250. | G. T. Parthiban G. Subramanian K. Muthuraman P. Ramakrishna Rao | 2017 | Journal of Marine Science and Application2017，16，2： | 1 |
| 2 | 天然海水中15CDV6/MDN138及15CDV6/MDN250合金的电流相互作用(英文)显示文摘The galvanic corrosion behavior of the metal combinations 15CDV6/MDN138 and 15CDV6/MDN250,with 1:1 area ratio,has been studied in natural seawater using the open well facility of CECRI’s Offshore Platform at Tuticorin for a year.The open circuit potentials of MDN138,MDN250,and 15CDV6 of the individual metal,the galvanic potential and galvanic current of the couples 15CDV6/MDN138 and 15CDV6/MDN250,were periodically monitored throughout the study period.The calcareous deposits on MDN138 and MDN250 in galvanic contact with 15CDV6 were analyzed using XRD.The electrochemical behavior of MDN138,MDN250,and 15CDV6 in seawater was studied using an electrochemical work station.The surface characteristics of MDN138 and MDN250 in galvanic contact with 15CDV6 have been examined with a scanning electron microscope.The results of the study reveal that the galvanic protection offered by 15CDV6 to MDN250 and MDN138 in natural seawater amounts to 93%and 98%,respectively,implying that the galvanic protection offered by 15CDV6 is continuous and effective,which has been further evinced from the adherent nature of the calcareous deposit film comprising compounds such as CaCO3(calcite,aragonite,and vaterite),MgCO3(magnesite),Mg(OH)2(brucite),and MgO(brucite). | P.Ramakrishna rao G.T.Parthiban G.Subramanian K.Muthuraman | 2019 | Journal of Marine Science and Application2019，18，2： | 0 |
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