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Builds upon a previous study that compared the corrosion resistance of multiple corrosion resistant alloys in several simulated (marine exhaust) scrubber environments.
New environmental regulations have substantially reduced the permissible level of sulfur oxide emissions from ocean vessels. An economical means of meeting the regulations is through the use of a diesel exhaust scrubber. The scrubber environment includes chlorides, high temperatures, and acidic conditions and requires the use of corrosion resistant alloys. This study will build upon a previous study that compared the corrosion resistance of multiple corrosion resistant alloys in several simulated scrubber environments. The current study evaluates the effect of welding and the presence of a crevice on five alloys. The alloys include a common austenitic alloy, UNS S31603; two superaustenitic alloys, N08367 and N08031; and two Ni-Cr-Mo alloys, N10276 and N06059. These comparisons are essential for proper material selection as the demand for marine exhaust scrubbers grows to meet the new regulations.
Key words: ASTM G48, marine, scrubber, stainless steels, nickel alloys, pitting corrosion, crevice corrosion, localized corrosion, welding
Permissible level of sulfur emissions from ocean vessels have been reduced. Diesel exhaust scrubbers are one response. The scrubber environment requires corrosion resistant alloys. This study compares multiple alloys in several simulated scrubber environments.
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Galvanic coupling corrosion risk between connection bolt materials and ASTM A1010 structural steel. ASTM A1010 has recently emerged for the construction of more corrosion-resistant bridges.
The paper discusses “past” developments, “present” status, and “future” advancements of inspection, monitoring, and modelling technologies.