共查询到20条相似文献,搜索用时 781 毫秒
1.
《船舶与海洋工程学报》2016,(3)
In view of their excellent mechanical properties, workability and heat treatment characteristics, MDN 138 MDN 250 have been widely used in missile, rocket and aerospace industries. With light weight and high performance characteristics HE 20 aluminium alloy acts as an important material in defence and aerospace applications. The galvanic corrosion behaviour of the metal combinations HE 20 / MDN 138 and HE 20 / MDN 250, 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 MDN 138, MDN 250 and HE 20 of the individual metal, the mixed potential and galvanic current of the couples HE 20 / MDN 138 and HE 20 / MDN 250 were periodically monitored throughout the study period. The calcareous deposits on MDN 138 and MDN 250 were analysed using XRD. The results of the study reveal that that HE 20 has offered required amount of protection to MDN 138 MDN 250. 相似文献
2.
The galvanic corrosion behavior of the metal combinations 15 CDV6/MDN138 and 15 CDV6/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 15 CDV6 of the individual metal, the galvanic potential and galvanic current of the couples 15 CDV6/MDN138 and 15 CDV6/MDN250, were periodically monitored throughout the study period. The calcareous deposits on MDN138 and MDN250 in galvanic contact with 15 CDV6 were analyzed using XRD. The electrochemical behavior of MDN138, MDN250, and 15 CDV6 in seawater was studied using an electrochemical work station. The surface characteristics of MDN138 and MDN250 in galvanic contact with 15 CDV6 have been examined with a scanning electron microscope. The results of the study reveal that the galvanic protection offered by15 CDV6 to MDN250 and MDN138 in natural seawater amounts to 93% and 98%, respectively, implying that the galvanic protection offered by 15 CDV6 is continuous and effective, which has been further evinced from the adherent nature of the calcareous deposit film comprising compounds such as CaCO_3(calcite, aragonite, and vaterite), MgCO_3(magnesite),Mg(OH)_2(brucite), and MgO(brucite). 相似文献
3.
4.
HE系列船用混油系统是上海航海仪器厂从日本引进的一种船用节油产品。该产品操作方便、技术先进、性能可靠、能大幅度降低船舶燃油费用。经中日双方商定,根据台同的规定及《HE系列船用混油装置工厂制造与试验技术条件》制订了考核、验收大纲,并由中日双方组成该产品的考核、验收小组,对该系列产品进行了 相似文献
5.
6.
7.
LZOD 15 mg/L舱底水报警装置及防蓄意操控对策 总被引:1,自引:0,他引:1
LZOD15mg/L舱底水报警装置,(简称:报警装置)按国际海上环境保护委员会MEPC.107(49)决议,对《修订的船舶处所舱底水防污染设备指南和技术条件》(简称“指南”)中规定的《15mg/L舱底水报警装置型式认可试验和性能条件》和《防污染设备型式认可环境试验技术条件》进行了系统的试验。对其试验条件、项目、方法和结果作一探讨和介绍。并对至今的舱底水报警装置,存在着人为蓄意操控的现状,提出满足“指南”所要求的能防备蓄意操控的对策。 相似文献
8.
9.
10.
11.
12.
13.
14.
15.
江雨 《舰载武器(含VCD光盘)》2013,(11):70-78
瑞典地处北欧,但与地处欧洲核心的瑞士一样,虽然长期没有战争的直接威胁,但周边却都是横刀立马的好战分子,均拥有独立的国防体系和较强的军事力量。从历史上看,瑞典军队也曾经在欧洲横行一时,先辈的历程为瑞典留下了强军的名声。 相似文献
16.
17.
为配合不断上升的货量,温哥华港将推出四个扩建项目。日前,港务局主席司徒大卫表示,整个扩建计划约共耗资15亿加元,将由港务局和各码头营运商共同投资。温哥华港代表表示,该港不会趁美西港口压港严重时吸纳其货量,反而是以照顾现有客户为先。温哥华很有信心不会出现如洛杉矶港类似的情况。 相似文献
18.
19.