Application of An Electrical Resistance Sensor-Based Automated Corrosion Monitor in the Study of Atmospheric Corrosion

Abstract

An automated corrosion monitor, named the Internet of Things atmospheric corrosion monitor (IoT ACM) has been developed. IoT ACM is based on electrical resistance sensor and enables accurate and continuous measurement of corrosion data of metallic materials. The objective of this research is to study the characteristics of atmospheric corrosion by analyzing the acquired corrosion data from IoT ACM. Employing data processing and data analysis methods to research the acquired corrosion data of steel, the atmospheric corrosion characteristics implied in the corrosion data can be discovered. Comparing the experiment results with the phenomenon of previous laboratory experiment and conclusions of previously published reports, the research results are tested and verified. The experiment results show that the change regulation of atmospheric corrosion data in the actual environment is reasonable and normal. The variation of corrosion depth is obviously influenced by relative humidity, temperature and part of air pollutants. It can be concluded that IoT ACM can be well applied to the conditions of atmospheric corrosion monitoring of metallic materials and the study of atmospheric corrosion by applying IoT ACM is effective and instructive under an actual atmospheric environment.

Modeling research of initial atmospheric corrosion of Q235 carbon steel based on electrical resistance probe

“…Electrical resistance probe in IoT ACM is a newly patented product, which is invented based on the concept of ASTM standard B 829–09 (2015) (Li et al , 2019). A comb shaped metallic material sheet in the electrical resistance probe can maximize the elimination of the influence caused by the change of ambient environmental temperature, obtain high accuracy corrosion data and ensure the occurrence of uniform corrosion as much as possible.…”

Data Mining to Atmospheric Corrosion Process Based on Evidence Fusion

“…Atmospheric corrosion, which may cause enormous economic and human life losses, has occurred in many industries such as infrastructure, energy, and transportation [1][2][3]. Nowadays, variant atmospheric corrosion monitor (ACM) sensors are developed to monitor the real-time corrosion behavior of materials in outdoor dynamic environments [4,5]. The collected big corrosion data contribute to further corrosion science research.…”

“…Recently, some statistical correlation coefficients have been employed to measure the influence of key atmospheric factors in the outdoor atmospheric corrosion process. The maximal information coefficient (MIC) well measures the relationship between some factors (RH, T, and pollutants) and the voltage ratio data [5]. Similarly, Pearson's correlation coefficient has been employed to identify the effect of important atmospheric parameters [15].…”

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

“…Various ACM technologies have been applied to assess the corrosivity of atmospheric environment based on different monitoring principles, such as the galvanic corrosion cell [13,14], electrochemical impedance [15][16][17], and electrical resistance [18,19] measurement. For galvanic-cell-based ACM sensors, active metals and noble metals are assembled as anodes and cathodes, respectively, in a closed cell to form galvanic couples, and a galvanometer is connected in series between the two kinds of electrodes to directly detect the galvanic current [13,14].…”

“…The corrosivity of the environment is reflected by the magnitude of the galvanic current, which is generated from the corroded sensor, instead of the substrate. Compared with the ACM technologies based on electrochemical impedance and electrical resistance measurements, the ACM with galvanic cells owns higher sensitivity to the change of atmospheric corrosivity, and avoids the interference of an external current that flows through the materials during measurement [15,16,18,19]. As a result, it is highly desirable to use the galvanic-cell-based ACM technology to assess the corrosivity and describe the corrosion performance of materials under atmospheric environments.…”