---
kind: "section"
citation: "49 C.F.R. § 193.2629"
title: "49"
number: "193.2629"
heading: "External corrosion control: buried or submerged components."
url: "https://uscodex.org/cfr/49/193.2629"
---

# §193.2629. External corrosion control: buried or submerged components.

- (a) Each buried or submerged component that is subject to external corrosive attack must be protected from external corrosion by—
  - (1) Material that has been designed and selected to resist the corrosive environment involved; or
  - (2) **The following means—**
    - (i) An external protective coating designed and installed to prevent corrosion attack and to meet the requirements of [§ 192.461](/cfr/49/192.461.md) of this chapter; and
    - (ii) A cathodic protection system designed to protect components in their entirety in accordance with the requirements of [§ 192.463](/cfr/49/192.463.md) of this chapter and placed in operation before October 23, 1981, or within 1 year after the component is constructed or installed, whichever is later.
- (b) Where cathodic protection is applied, components that are electrically interconnected must be protected as a unit.

## Notes

### Amendments

[Amdt. 193-2, 45 FR 70407, Oct. 23, 1980, as amended at 47 FR 32720, July 29, 1982]

### Source

Source: Amdt. 193-2, 45 FR 70407, Oct. 23, 1980, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 5103, 60102, 60103, 60104, 60108, 60109, 60110, 60113, 60118; and 49 CFR 1.53.

### Source

Source: 45 FR 9203, Feb. 11, 1980, unless otherwise noted.

### Amendments

[Amdt. 193-2, 45 FR 70407, Oct. 23, 1980, as amended at 47 FR 32720, July 29, 1982]