Smooth Sailing, Nickel Magazine vol.20 n°2, p.16
Perhaps the oldest copper-nickel boat in existence, the Asperida is still in fine shape.
This paper summarised 22 case histories of severe galvanic corrosion problems and solutions that the author has encountered in heat exchangers, condensers, pumps and valves, welds in hull plate, copper-nickel and nickel-copper, fasteners, ballast tanks and partially-lined tanks. There are guidelines to assist engineers in managing galvanic corrosion problems that they may encounter.
Nickel-containing stainless steels and nickel- and copper-base alloys are readily fusion-welded to carbon and low-alloy steels and to each other. Methods are described to estimate the weld metal composition of dissimilar-metal welds. Knowing the composition, weld properties can be predicted for a wide range of dissimilar-metal welds.
Effects of parent material purity, weld heat-input and weld metal composition on fusion boundary cracking when welding thick, wrought, CuNi10Fe alloy plates.
Copper has excellent atmospheric and fresh water corrosion resistance. The addition of nickel to copper further improves its strength and durability and also its resistance to corrosion, erosion and cavitation in all-natural waters, including seawater and brackish, treated or polluted waters.
Guidelines to allow engineers to make a reasonable estimate of the effect of the environment on copper alloy performance.
The report identifies some of the principal factors that affect the performance of piping used for cooling water. Although several factors are interrelated, each is considered separately. This allows the engineer to use the report as an engineering checklist to ensure that none of the major factors has been overlooked. Studied are: carbon steel cement-lined piping and other coated steel piping types; nickel-containing stainless steels; copper-nickel alloys and aluminum bronze; and 6% molybdenum austenitic stainless steels and titanium. Factors that affect their behaviour are identified and one of three ratings given.
Presented at the 28th Annual Conference of Metallurgists of the Canadian Institute of Mining and Metallurgy Meeting of Sea and Science, Halifax, Nova Scotia, Aug 20-24, 1989. Considered are the technical (including fabrication) and economic factors influencing the choice of nickel-containing alloy piping - topside and subsea system applications (excluding downhole) in stainless steels (standard austenitic, duplex and high-alloy grades), nickel-base alloys and cupronickels.
The need for large volumes of water for cooling purposes in the desalination industry has resulted in the location of many major industries on the coast. Recognised as the most corrosive natural environment, marine areas cause design problems in selecting materials that offer good performance at reasonable cost. Nickel-containing materials -- such as copper-nickel alloys, stainless steels and nickel-base alloys have been found to provide optimum techno-economic solutions.