A direct current voltage gradient (DCVG) survey is a type of survey method that is used to assess the efficacy of corrosion protection, particularly on structures buried underground.

This is highly useful in the natural gas and oil industries, as this technique is used to trace coating faults as well as determine the deficits in the strategies that are used to control corrosion.

Attached photos from previous job had been performed by ARD Al-WAHRAN inspection team at Basra Oil Co. fields.