# What coating material may I use for external corrosion control?

- **operation:** document
- **citation:** 49 CFR 195.559
- **title:** What coating material may I use for external corrosion control?
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** Coating material for external corrosion control under § 195.557 must—

(a) Be designed to mitigate corrosion of the buried or submerged pipeline;

(b) Have sufficient adhesion to the metal surface to prevent under film migration of moisture;

(c) Be sufficiently ductile to resist cracking;

(d) Have
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-195-559.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-195-559
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-195.559
**body:**

Coating material for external corrosion control under § 195.557 must—

(a) Be designed to mitigate corrosion of the buried or submerged pipeline;

(b) Have sufficient adhesion to the metal surface to prevent under film migration of moisture;

(c) Be sufficiently ductile to resist cracking;

(d) Have enough strength to resist damage due to handling and soil stress;

(e) Support any supplemental cathodic protection; and

(f) If the coating is an insulating type, have low moisture absorption and provide high electrical resistance.
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- **body characters:** 533