Atmospheric Corrosion Sensor Based on Strain Measurement with an Active Dummy Circuit Method in Experiment with Corrosion Products

Abstract

This study analyzed an atmospheric corrosion sensor using strain measurements (ACSSM) with an active dummy method for corrosion product experiments. An initial compensation thermal strain experiment was performed with elapsed time. Further analyses used dry-wet environments with salt water spray to investigate the thickness reduction performance of the corrosion product on low-carbon steel samples. The ACSSM with an active dummy method accurately measured signals induced by the specimen thickness reduction, despite the noise in the signal. Moreover, the effects of corrosion products on the signal were discussed.

Application of Machine Learning for Data with an Atmospheric Corrosion Monitoring Sensor Based on Strain Measurements

“…A schematic diagram of the test piece is shown in Figure 2. The ACM device also had a base and cover with ρ = 430 mm, as in reference [15]. The test piece was placed in the apparatus.…”

“…A full bridge with 2 active and 2 dummy gauges was employed to enhance the accuracy of the measurement. In addition, to cancel noise from the strain measurement circuit, two identical strain measurement circuits were manufactured, and one of them was used as a dummy circuit [14,15]. The active gauges of the active circuit detected strain based on changes in the thickness of the test piece, temperature changes, and the formation of corrosion products.…”

“…Our previous studies have proposed an ACM sensor using strain measurements [13][14][15][16]. Nining et al [15] studied an ACM sensor using strain measurements with the activedummy method and reported that the measured signals of the test piece corresponded to its thickness reduction. However, these signals contained errors induced by temperature changes and corrosion products.…”

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

“…At present, severity evaluations of atmospheric corrosion are mainly carried out by corrosion coupons [5][6][7], which are difficult to use to track the dynamic process of atmospheric corrosion continuously [8][9][10]. In contrast, atmospheric corrosion monitoring (ACM) technologies can create detailed descriptions of atmospheric corrosion, and help us to understand how such a process is influenced by the complex environmental parameters [11,12].…”

Corrosion and Protection of Metals

“…A new atmospheric corrosion sensor utilizing strain measurements (ACSSM) was developed by Purwasih et al [8]. The sensor fundamentals are based on the influence of the strain variations (∆ε) on the compressive surface of a low-carbon steel under a bending moment, considering the corrosion product layers formed, and assuming three different stages: stage I, free corrosion Fe surface (∆ε = 0); stage II, tight corrosion products (∆ε < 0); and stage III, porous corrosion products layer (∆ε > 0).…”