Electrochemical protection of zirconium in oxidizing hydrochloric acid solutions

Journal Article · Fri Jun 01 00:00:00 EDT 1984 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3581955· OSTI ID:6393807

Yuu, T-L; Maguire, M

An electrochemical protection technique using cathodic polarization to maintain zirconium below its critical repassivation potential was used to avoid pitting and stress corrosion cracking (SCC) in hydrochloric acid (HCI) containing ferric ions (Fe/sup +3/). Corrosion and pit penetration rates are reported for pickled, abraded, and as-received surface conditions in 10, 20, and 37% HCI containing 50, 100, or 500 ppm Fe/sup +3/ at temperatures to boiling. The pickled surface was the least susceptible to pitting in the 64 day tests. Electrochemical protection is then evaluated for total immersion, partial immersion, U-bend, and constant strain rate tensile tests. Protection is effective in eliminating pitting and SCC in 10 and 20% HCI containing Fe/sup +3/.

• Research Organization: Metallurgical Research and Development, Teledyne Wah Chang Albany, Albany, OR
• OSTI ID: 6393807
• Journal Information: Corrosion (Houston); (United States), Vol. 40:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ZIRCONIUM
CATHODIC PROTECTION
ELECTROCHEMICAL CORROSION
PITTING CORROSION
POLARIZATION
CORROSION RESISTANCE
CRACKS
DESTRUCTIVE TESTING
HYDROCHLORIC ACID
IRON COMPOUNDS
OXIDATION
PASSIVATION
STRAIN RATE
STRESS CORROSION
SURFACE PROPERTIES
TENSILE PROPERTIES
CHEMICAL REACTIONS
CORROSION
CORROSION PROTECTION
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion