# COQTEL project dataset : Corrosion quantification trough extended use of Lamb waves

## TL;DR

This paper presents a dataset from experiments using Lamb waves to monitor corrosion in stainless steel, aiming to improve safety and cost-efficiency in the aerospace industry.

## Contribution

The novelty lies in using electrochemically controlled corrosion and Lamb waves for real-time monitoring with a sparse PZT array.

## Key findings

- Corrosion pit growth was successfully monitored in-situ every 10 seconds using a sparse PZT array.
- Two experiments demonstrated the repeatability of the corrosion monitoring approach.
- The dataset supports the development of Structural Health Monitoring algorithms and damage modeling.

## Abstract

Corrosion poses significant safety and cost challenges in the aeronautic industry. Ultrasonic Lamb Waves (LW), emitted and received by a sparse array of piezoelectric elements (PZT), offer an efficient, cost-effective, and versatile solution for corrosion monitoring. This dataset corresponds to two experiments involving a LW solution based on a sparse PZT array and able to monitor corrosion pit growth on a 316L stainless steel plate during controlled corrosion. The corrosion pit size is electrochemically controlled by the imposed electrical potential and the injection of a corrosive NaCl solution through a capillary at the desired pit location. Simultaneously, the corrosion pit growth is monitored in-situ every 10 seconds using a sparse array of 4 PZTs bonded to the back of the steel plate. Two independent experiments were conducted to assess the repeatability of this approach. The collected dataset collected can facilitate the development of Structural Health Monitoring (SHM) algorithms and methodologies, provide data for waves/damage interaction modeling, and help bridging the gap between research and industry in this domain.