Corrosion of steels in concrete is a global problem for concrete structures. When steels corrode, there are usually signs of deterioration on the concrete surface such as rusting, cracking and spalling.

Half-cell potential measurements are simple, and virtually non-destructive techniques used to estimate the corrosion risk of steels even if there are no signs of corrosion on the concrete surface, which is a significant advantage for inspecting existing concrete structures.

Corroding and passive rebar in concrete show a difference in electrical potential and current flows between these areas. The electric field coupled with the corrosion between corroding and passive rebar areas can be measured with a half-cell placed on the concrete’s surface, allowing to locate corroding rebars.

EQS Global is an independent and certified inspection company, offering a full range of services dedicated to inspection and testing, and the necessary knowledge to support its clients throughout the assets' lifecycle.