Journal of Engineering Research

In the long-term service of sluice metal structures, twin corrosion frequently occurs under the influence of complex aquatic environments and load actions, leading to reduced structural safety and shortened service life. Acoustic emission technology, as a sensitive non-destructive testing method, enables online diagnosis at the early stage of corrosion by capturing weak energy release signals, thus addressing the issues of lag and significant limitations associated with traditional testing methods. This paper takes sluice metal structures as the research subject, conducts an analysis focusing on the mechanism of twin corrosion and acoustic emission characteristics, establishes the corresponding relationship between acoustic emission signal parameters and the corrosion development process, and constructs an online monitoring and identification model to achieve real-time detection and early warning of corrosion conditions. This method can effectively enhance the safety management level of sluice operation, provide important references for the health monitoring and service life prediction of engineering facilities, and possesses strong prospects for engineering application and popularization value.

Sluice metal structure; Twin corrosion; Acoustic emission; Online diagnosis