The purpose of this NACE International technical report is to provide basic information regarding the mechanisms involved with cathodic protection (CP) shielding for external coatings applied to carbon steel pipelines, and the manner in which the breakdown of coating systems may or may not contribute to CP shielding. It is intended to be a basic reference from which the tendency of a coating system to fail and shield CP may be understood on a conceptual basis. Non-corrosion-related pipeline protection systems, including concrete weight coating, polyethylene encasement, insulation, and mechanical pipeline protection systems, are outside the scope of this report. End users of this report may include pipeline designers, corrosion engineers, integrity management specialists, regulators, CP service providers, coating suppliers, coating service providers, equipment suppliers, and pipeline/facility owners.

NEW NACE Standard Test Method for 2018! This NACE International test method describes a reliable methodology for determining the peel strength of polyolefin-based multilayer pipeline coating systems, generally for coating thickness less than 12 mm (0.47 in). This standard provides a method to measure the peel strength of polyolefin-based multilayer coating systems, such as 2-layer polyethylene coating [2LPE], 3-layer polyethylene [3LPE], 3-layer polypropylene [3LPP], and heat shrink sleeve[HSS] field joint coating.

It provides essential information on the quality of the applied coating. This is particularly important for field-applied coatings, of which the application process is significantly impacted by the environmental conditions and the skill set of the field applicators. This test method is intended for use by pipeline operating companies, pipeline owners, pipeline contractors, pipeline inspection services companies, and pipeline coating mills.

NACE TM0497-2018 describes and illustrates testing procedures for measuring potentials that are used to determine whether a CP criterion is achieved at a test site on underground or submerged metallic piping.

The provisions of this standard shall be applied by personnel who have the knowledge and understanding of the fundementals of cathodic protection of buried and submerged metallic piping systems acquired by education and related practical experience.

Special conditions in which a given test technique is ineffective or only partially effective sometimes exist. Refer to Paragraphs 5.9 and 6.1. Deviation from this standard may be warranted in specific situations.

This NACE standard test method applies to the internal surfaces of pipelines, and describes types of microorganisms, mechanisms by which MIC occurs, methods for sampling and testing for the presence of microorganisms, research results, and interpretation of test results. Sections 1 through 4 of this standard discuss the technical aspects of MIC. Sections 5 through 7 discuss field equipment and testing procedures. This standard is maintained by Task Group 254.

This standard practice presents guidelines and procedures for use during risk assessment, mitigation, and monitoring of corrosion on underground, cathodically protected steel piping systems caused by proximity to alternating current (AC) power supply systems.

As shared right-of-way and utility corridor practices become more common, AC influence on adjacent metallic structures has greater significance, and corrosion due to AC influence becomes of greater concern. This standard is not intended to supersede or replace existing corrosion control standards, but rather to complement these standards when the influence of AC-powered systems becomes significant.

The effects of lightning and AC power transmission systems on human safety are not covered by this standard. However, the mitigation measures implemented for safety and system protection, as outlined in NACE SP0177, can also be used for AC corrosion control and are cited whenever feasible.