Abstract

The accuracy of corrosion rate estimation using atmospheric corrosion monitoring (ACM) sensors is improved using humidity data. This methodology determines the daily amount of sea salt, Ws, to consecutively determine rain/dew/dry conditions for instantaneous output. ACM outputs observed in 4.8-m-long steel pipe braces installed on the Japanese coast were used to verify the methodology. Ws is the basic value used in analysis and is in agreement with experimental observations. When using this methodology, divergence of estimated and observed corrosion rates was reduced by up to 40% compared with results using the conventional methodology that determines rainfall using only outputs from ACM sensors.

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