New Accelerated Corrosion Test Method Simulating Atmospheric Corrosion of Complex Phase Steel Combining Cyclic Corrosion Test and Electrochemically Accelerated Corrosion Test

Abstract

The automobile industry commonly uses cyclic corrosion tests (CCTs) to evaluate the durability of materials. However, the extended evaluation period required by CCTs can pose challenges in this fast-paced industry. To address this issue, a new approach that combines a CCT with an electrochemically accelerated corrosion test has been explored, to shorten the evaluation period. This method involves the formation of a corrosion product layer through a CCT, which leads to localized corrosion, followed by applying an electrochemically accelerated corrosion test using an agar gel electrolyte to preserve the corrosion product layer as much as possible. The results indicate that this approach can achieve comparable localized corrosion resistance, with similar localized corrosion area ratios and maximum localized corrosion depths to those obtained through a conventional CCT in half the time.

Influence of UV Illumination on the Corrosion Behavior of New 3Ni Weathering Steel in Marine Atmospheric Environments

“…The Mott-Schottky relationship [9,22,23] describes the relationship between th differential capacitance of the space charge layer of a semiconductor and the potential o the semiconductor surface with respect to the body, as communicated below:…”

“…In Figure 5, the different symbols are the actual measured data points and line is the result after fitting through the equivalent circuit. According to the fittin two equivalent circuits, the electron transfer behavior and corrosion proces analyzed 3Ni weathering steel in 3.5% NaCl solution can be explained more clea There are two sets of double capacitance structures between the rusted expe The Mott-Schottky relationship [9,22,23] describes the relationship between the differential capacitance of the space charge layer of a semiconductor and the potential of the semiconductor surface with respect to the body, as communicated below:…”

“…The nature of the atmospheric environment, the state of the rust layer and the metal material itself all influence the corrosion process and corrosion rate of metal materials [3][4][5]. A large number of pitting failures occur in bridges, ships and other metal structures in the harsh ocean environment with high humidity and high Cl − concentrations; thus, much research has been carried out to explore the effects of temperature, humidity, corrosive media and the corrosion of metal materials [6][7][8][9][10].…”

The Corrosion Inhibition of Montmorillonite Nanoclay for Steel in Acidic Solution

“…Researchers have investigated the corrosion inhibition property of sodium lignosulfonate in HCl, using three different independent monitoring techniques, which are weight-loss measurements, electrical conductance, and potentiodynamic polarization [ 10 , 11 ]. Many researchers have studied the corrosion inhibition of steel and other metals in various environments, including HCl [ 4 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. The mechanism of inhibition depends on many factors, such as the metal type, medium type and concentration, nature of the inhibitor, and temperature [ 23 ].…”

Effect of Frequency and Ratio of Wet/Dry Stages in Cyclic Corrosion Tests on Localized Corrosion of Complex-Phase High-Strength Steel

“…The cyclic corrosion test (CCT) stands as one of the most widely accepted and representative corrosion tests in atmospheric corrosion studies. Its popularity stems from its ability to provide insights into material interactions with corrosion products under realistic environmental conditions [8][9][10][11]. CCT conditions subject materials to various corrosion parameters, including salt concentration, time of a cycle, humidity, and temperature, thereby enabling the assessment of atmospheric corrosion behavior within specific environmental contexts.…”