---
kind: "section"
citation: "46 C.F.R. § 35.01-25"
title: "46"
number: "35.01-25"
heading: "Sacrificial anode installations—TB/ALL."
url: "https://uscodex.org/cfr/46/35.01-25"
---

# §35.01-25. Sacrificial anode installations—TB/ALL.

- (a) The installation of magnesium sacrificial anodes in cargo tanks utilized for the carriage of flammable or combustible liquids in bulk is prohibited.
- (b) A sacrificial anode using an aluminum alloy will be permitted in cargo tanks under the following criteria:
  - (1) The maximum allowable energy that can be developed by a falling anode shall be 200 foot-pounds.
  - (2) No anode shall be installed more than 6 feet above the bottom of the tank. Special consideration will be given when structural design prevents the anodes from falling in event of failure of the attachments.
  - (3) Each anode shall have at least two welded or bolted connections to the supporting structure. Special consideration will be given to proprietary attachments which provide equally safe installations.
  - (4) The plans of the anode installation and a chemical analysis of the alloy composition shall be submitted for approval. The anode should be magnesium free and the silicon content limited to trace amounts.
  - (5) **The recommended construction of the anode should utilize a mild steel core with necessary attachments.** Other types may be used but will require special consideration.
- (c) Sacrificial anodes using materials other than those having aluminum and/or magnesium in whole or in part are permitted.

## Notes

### Amendments

[CGFR 69-72, 34 FR 17482, Oct. 29, 1969]

### Authority

Authority: 33 U.S.C. 1321(j); 46 U.S.C. 3306, 3703, 6101, 70011, 70034; 49 U.S.C. 5103, 5106; Executive Order 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Executive Order 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 65-50, 30 FR 16704, Dec. 30, 1965, unless otherwise noted.

### Amendments

[CGFR 69-72, 34 FR 17482, Oct. 29, 1969]