Atmospheric Corrosion and Precipitation Runoff From Zinc and Zinc Alloys Surfaces

Conference · Sun Mar 16 04:00:00 EST 2003

OSTI ID:821882

Matthes, S A ^[1]; Cramer, S D; Bullard, S J; Covino, Jr, B S; Holcomb, G R

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1. Albany Research Center

The long-term atmospheric corrosion performance of rolled zinc and three thermal-sprayed (TS) zinc materials (Zn, Zn-15Al, and Al-12Zn-0.2In) was characterized by measuring corrosion product concentrations in precipitation runoff at coastal marine and inland sites. Corrosion rates and average zinc concentrations in the runoff were greater at the site having higher annual rainfall. Higher chloride concentrations did not seem to affect either the corrosion rates or the zinc concentrations in the runoff at the coastal site compared to those of the inland site. Zinc runoff concentrations were higher for TS Zn than rolled zinc due to the greater surface area of the thermal-sprayed surface. Average cumulative zinc runoff losses for the two sites were: 64 {micro}mol Zn/L for TS Zn, 37 {micro}mol Zn/L for rolled Zn, 24 {micro}mol Zn/L for TS Zn-15Al, and 1.8 {micro}mol Zn/L for TS Al-12Zn-0.2In. Cumulative zinc runoff losses were directly related both to the precipitation rate and to the availability of Zn in metal surfaces, a consequence of surface roughness and surface chemistry properties of the metal.

• Research Organization: Albany Research Center, OR (US)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE) (US)
• OSTI ID: 821882
• Report Number(s): DOE/ARC-2003-003
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
ALUMINIUM
ALUMINUM-ZINC-INDIUM
ATMOSPHERIC CORROSION
AVAILABILITY
CHEMISTRY
CHLORIDES
CORROSION
CORROSION FILM
CORROSION PRODUCTS
ENVIRONMENT
INDIUM
PERFORMANCE
PRECIPITATION
PRECIPITATION RUNOFF
ROLLED ZINC
ROUGHNESS
RUNOFF
SURFACE AREA
THERMAL SPRAY
ZINC
ZINC ALLOYS
ZINC-ALUMINUM