Solution: Corrosion monitoring

Traditionally corrosion rates of a system are followed up by means of periodic inspection of the installation (determination of wall thickness by means of UT) or via corrosion coupons (test plates). By means of these techniques an average corrosion rate is determined over the entire exposure time. Besides quantitative information, corrosion coupons also yield information about the corrosion mechanism. TÜV AUSTRIA Belgium (formerly METALogic) can assist you with delivery and evaluation of corrosion coupons.

However, for applications that need real time corrosion monitoring, on-line techniques like LPR (Linear Polarization Resistance) offer a solution. A LPR probe consists of three electrodes that are positioned in a medium: a working electrode, counter electrode and reference electrode. A small perturbation in potential is applied between counter electrode and working electrode and the resulting current is measured. This measured current can then be converted into a corrosion rate.