In China, CIPS test technology is becoming more and more applied, Thus many
companies and pipeline scientific research institution have equipped that kind of
instrument. But during the fieldwork application, there exist some problems in
different extent. In this paper, four kinds of corrosion protection coatings, such
as petroleum bitumen coating, coal tar enamels coating, fusion-bonded epoxy coating
and 3 layer PE coating, are tested. And for petroleum bitumen coating, four different
kinds of ON/OFF cycles are attempted. At last, combining with the test result, some
experiences and consideration are presented.