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Citation:
 G. T. Parthiban,G. Subramanian,K. Muthuraman,et al.Galvanic Interactions of HE15/MDN138 & HE15/MDN250 Alloys in Natural Seawater[J].Journal of Marine Science and Application,2017,(2):237-242.[doi:10.1007/s11804-017-1412-z]
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Galvanic Interactions of HE15/MDN138 & HE15/MDN250 Alloys in Natural Seawater

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Title:
Galvanic Interactions of HE15/MDN138 & HE15/MDN250 Alloys in Natural Seawater
Author(s):
G. T. Parthiban1 G. Subramanian2 K. Muthuraman1 P. Ramakrishna Rao3
Affilations:
Author(s):
G. T. Parthiban1 G. Subramanian2 K. Muthuraman1 P. Ramakrishna Rao3
1. CSIR-Central Electrochemical Research Institute, Karaikudi-630003, India;
2. Offshore Platform & Marine Electrochemistry Centre, CSIR-CECRI Unit, Harbour Area, Tuticorin-628004, India;
3. Defence Research Development Laboratory, Hyderabad-500058, India
Keywords:
alloyMDN138MDN250HE15galvanic corrosionnatural seawater
分类号:
-
DOI:
10.1007/s11804-017-1412-z
Abstract:
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/MDN250were 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.

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Memo

Memo:
Received date:2016-7-15;Accepted date:2016-11-2。
Foundation item:Supported by Project Director, DRDL, Hyderabad, India(Project No. SSP 0709
Corresponding author:G.Subramanian, Email: cgscorr@yahoo.co.in
Last Update: 2017-05-09