DCVG

DCVG (Direct Current Voltage Gradient) is a non-invasive method for assessing the effectiveness of corrosion protection on buried steel structures, particularly pipelines. This technique relies on the principle that any defects in the protective coating surrounding a buried pipeline will allow current to flow from the surrounding soil to the metal surface, establishing voltage gradients in the soil. By measuring these voltage gradients using a DCVG meter, the location and severity of coating defects can be accurately identified.