What properties should the anti-corrosion layer of the steel pipeline have

(1) Effective electrical insulation.
(2) It has good moisture and water resistance.
(3) It has strong mechanical strength.
(4) The anti-corrosion layer has good adhesion to the steel surface.
(5) The material and construction process of the anti-corrosion layer should not adversely affect the performance of the masterbatch.
(6) It has good resistance to cathodic dis-bonding.
(7) It has good chemical resistance and aging resistance.
(8) The damage to the anti-corrosion layer is easy to repair.
(9) The impact of the anti-corrosion layer on the environment shall meet the corresponding requirements.