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

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.

Automated summary

The automobile industry often uses cyclic corrosion tests (CCTs) to assess material durability. However, the lengthy evaluation period of CCTs can be problematic in this fast-paced industry. To overcome this challenge, researchers have explored a new approach that combines a CCT with an electrochemically accelerated corrosion test to reduce the evaluation time. This method involves the formation of a corrosion product layer through a CCT, resulting in localized corrosion, followed by an electrochemically accelerated corrosion test using an agar gel electrolyte to preserve the corrosion product layer. The results demonstrate that this approach can achieve comparable localized corrosion resistance, with similar area ratios and depths, in half the time compared to a conventional CCT.