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Atmospheric Corrosivity

The Pacific West Coast vs. Inland of the Bay of Fundy on the East Coast

Sets of CLIMAT coupons were placed on the corrosion exposure rack at Canadian Forces Base (CFB) Esquimalt while other sets were installed on a pedestal besides the weather station at Canadian Forces Base (CFB) Greenwood, near Kingston Nova Scotia, Canada, and sampled on a monthly basis for five years.

Average monthly corrosion mass loss measured for a period of five years at two marine locations, one directly on the sea coast and the one 8 km inland from the coast

Average monthly corrosion mass loss measured for a period of five years at two marine locations, one directly on the sea coast and the one 10 km inland from the coast

By looking at these results one has to conclude that the Winter months are the most corrosive months in these particular marine environments. An interesting observation is that the corrosivity of these very distant marine environments follows the same pattern, i.e. corrosive Winters vs. much less corrosive Summers.