Laboratory evaluation of sacrificial anode materials for cathodic protection of reinforced concrete bridges

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Corrosion

DOI:https://doi.org/10.5006/1.3292136· OSTI ID:244985

Whiting, D A; Nagi, M A ^[1]; Broomfield, J P ^[2]

---

1. Construction Technology Labs. Inc., Skokie, IL (United States)
2. Broomfield (J.P.), London (United Kingdom)

Laboratory evaluations were conducted on a series of anode materials that could be used for sacrificial cathodic protection (CP) of reinforced concrete bridge decks. These include Al, Mg, and Zn alloys. Anodes were fabricated into test coupons and coupled to small lengths of reinforcing steel. The anode-steel couples were placed in simulated concrete environments consisting of sealed containers filled with silica sand treated with a mixed alkali solution containing 6 kg/m{sup 3} of chloride ion by volume of sand. The treated sands were dried to obtain resistivities of 23 {Omega}-m, 100 {Omega}-m, and 260 {Omega}-m. Measurements of current flow, circuit resistance, potential, and depolarization were made over 18 weeks. Al and Zn anodes showed the most promise for use as galvanic anodes in reinforced concrete bridge decks.

• Sponsoring Organization: USDOE
• OSTI ID: 244985
• Journal Information: Corrosion, Journal Name: Corrosion Journal Issue: 6 Vol. 52; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM ALLOYS
ANODES
CATHODIC PROTECTION
MAGNESIUM ALLOYS
MATERIALS TESTING
OFFSHORE PLATFORMS
REINFORCED CONCRETE
ZINC ALLOYS