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Galvanic Corrosion of 70-30 Copper-Nickel Alloy in Contact with Nickel-Aluminum Bronze in Simulated Deep Sea Environment XING Qing1,2,FAN Lin1,*,GUO Weimin1, CHEN Xiangxi3,GONG Lihua2 and YANG Chao1 1State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 2College of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 3College ofElectromechanicalEngineering, Qingdao University of Science and Technology, Qingdao *Correspondent: FAN Lin, E-mail: flynnfan@163.com Keywords:copper-nickel alloy; nickel-aluminum bronze; deep sea; galvanic corrosion; electrochemical behavior Abstract.The galvanic corrosion behavior of 70-30 copper-nickel alloy as a brand new seawater pipe material and nickel-aluminum bronze as the commonly used pipe valve material in simulated low temperature conditions of deep sea was studied.The galvanic corrosion potential and galvanic current density
Introduction Many metallic materials have been used in the constructions ofmarine facilities, such as deep sea pipelines, ships and oil rigs.
As the increase in use of copper-nickel alloy and nickel-aluminum bronze as the ship piping materials, the galvanic corrosion behavior will be a serious threat to the service safety of them, especially in deep sea environment.
Table 1.Chemical composition of Cu-Ni alloy and Cu-Al-Ni alloy (wt. %) Materials Chemical composition (wt. %) Ni Fe Mn S C Al Cu Cu-Ni 30.08 0.56 0.732 <0.01 0.0034 — Bal.
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Introduction Wool is one of the upscale textile materials, enriched with the excellent performances such as elasticity, soft hand and heat retention, etc.
Experimental Experimental materials and instrument.
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Some journals are published study geography problem mathematically.
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All above have created good condition for the blast furnace production to improve the level of concentrated material and reduce the raw materials consumption.
The large pallet baking machine is adopted in pelletizing process, and the materials are in a quiescent state during the baking.
The coal ash of power plant is about 260000 t/a, and it has been produced into building materials.
Coking produce ammonium sulfate, tar, light benzol and heavy benzol about 278000 tons annually, and all of them are high-quality chemical raw materials.
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The investigation has been based on a detailed buckling analysis using both linear and non-linear FEA to analyze a range of standard samples of different materials.
The parameters studied were length (L), diameter (D), laminate thickness (T) and in the case of GRP materials the circumferential and longitudinal Young’s Modulus of Elasticity E1 and E2, respectively.
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