NACE AMPP SP21438-2023 PDF

This standard presents acceptable methods and practices for the control of external corrosion on non-mobile structures constructed of steel, stainless steel, cast iron, or aluminum immersed in fresh water through the use of cathodic protection (CP). Such structures may include, but are not limited to trash racks, dams, gates, dock pilings, sheet pilings, and other similar structures located in lakes, rivers, streams, canals, or other similar bodies of fresh water.

These recommendations are not intended for pipelines or structures submerged in waters with elevated salinity. Neither is it intended for mobile structures such as boats, barges, or similar conveyances. However, under some circumstances, these recommendations may be applicable to these situations. It is intended for use by corrosion control personnel concerned with the corrosion of structures submerged in fresh water, including dams, docks, gates, piers, pilings, and similar structures. This standard describes the use of electrically insulating coatings, electrical isolation, and cathodic protection (CP) as external corrosion control methods. It contains specific provisions for the application of CP to existing bare, existing coated, and new structures. The procedures in this standard may best be applied by persons with experience in the design and operation of corrosion control on submerged structures.