Investigation of Corrosion Behaviors on an Fe/Cu-Type ACM Sensor under Various Environments

Abstract

<jats:p>The applicability of galvanic-cell-based atmospheric corrosion monitoring (ACM) technology has been confirmed empirically in field tests, however the corrosion behaviors on the ACM sensors have rarely been studied systematically. In this study, the influence of temperature, chloride ions, and hydrosulfite (simulated sulfur dioxide) ions on the corrosion behaviors of Fe/Cu-type ACM sensors was investigated. The results show that the hydrosulfite ions led to a larger increase in the Fe/Cu-based ACM current than chloride ions in the initial stage of corrosion, and both changed the components of the corrosion products. Moreover, the hydrosulfite and chloride ions showed a synergistic effect on the corroded ACM sensor. Lastly, a positive correlation between ACM technology and the mass loss method was observed, further indicating that ACM technology can be an effective, convenient, and fast approach to studying the accelerated corrosion behaviors of steels.</jats:p>

Developing a regional environmental corrosion model for Q235 carbon steel using a data-driven construction method

“…All the environmental factors listed in Table 1 can affect metal corrosion (Oesch, 1996;Chen et al, 2005;Corvo et al, 2005;Syed, 2008;Rouillard et al, 2009;Li et al, 2013;Nguyen et al, 2013;Nyrkova et al, 2013;Wang et al, 2013;Pei et al, 2020), and coupling relationships exist among these factors (Meng et al, 2021). The role of each environmental factor in the corrosion of carbon steel depends on the region.…”

Measurement of Water Retention Ratio in Rust Layer by Electrical Resistance

“…As the measuring method for the wetness of the steel surface, time of wetness (TOW) has been used. ISO-9223 [4] defined TOW as the time period during which relative humidity is in excess of 80% and the temperature is above 0 • C. In addition, the Atmospheric Corrosion Monitor (ACM) corrosion sensor is commonly used to evaluate the corrosivity of atmospheric environments by calculating TOW based on the measured galvanic current [5][6][7]. The ACM sensors are attached to the surface of the target; thus, this method cannot directly measure the water inside the rust layer.…”