本标准描述了自动控制的外加电流阴极保护系统，旨在最大限度地减少钢制储水罐内部浸没表面和30 in.的腐蚀。（750 mm）直径和更大的高架水箱湿立管。本标准不描述牺牲（原）阳极型阴极保护系统或手动控制的外加电流系统。本版本中对ANSI/AWWA D104的修订是编辑性的，主要目的是提高清晰度。

This standard describes automatically controlled, impressed-current cathodic protection systems intended to minimize corrosion of interior submerged surfaces of steel water storage tanks and 30-in. (750-mm) diameter and larger wet risers of elevated tanks.This standard does not describe sacrificial (galvanic) anode-type cathodic protection systems or manually controlled, impressed-current systems. The revisions to ANSI/AWWA D104 in this edition are editorial with the primary intent to improve clarity.