Abstract
In order to evaluate the corrosion on the inner part of pipelines in an effective way, the field experiments of a novel coating system have been conducted in the fields in Daqing and Sichuan, China by means of an electrochemical hydrogen permeation method. It was shown from the result of the experiments in Daqing that there was no significant corrosion on the inner walls of the pipes and no degradation of coating films by detecting the much less hydrogen atoms on the outer walls of pipes. Whereas the electrochemical reaction relating to the permeated hydrogen was measured on the outer walls of the pipes in Sichuan oil field, where the hydrogen sulfide content in natural gas is about 50%. The results showed the same manner as the one in the laboratory.
