---
kind: "section"
citation: "40 C.F.R. § 139.13"
title: "40"
number: "139.13"
heading: "Cathodic protection."
url: "https://uscodex.org/cfr/40/139.13"
---

# §139.13. Cathodic protection.

- (a) The requirements in [paragraph (b)](#b) of this section apply to discharges resulting from a vessel's cathodic corrosion control protection device, including but not limited to sacrificial anodes and impressed current cathodic protection (ICCP) systems.
- (b) Spaces between any flush-fit anode and backing must be filled to remove potential hotspots for biofouling organisms.
- (c) The vessel operator must consider using, but is not required to use, less toxic metals when selecting sacrificial anodes.

## Notes

### Authority

Authority: 33 U.S.C. 1251 et seq.

### Source

Source: 89 FR 82131, Oct. 9, 2024, unless otherwise noted.