Corrosion behavior of 8090 Al-Li alloy

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3316078· OSTI ID:6051132

Hu, Z Q; Zhang, Y; Liu, Y L ^[1]; Zhu, Z Y ^[2]

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1. Academia Sinica, Shenyang (China). Inst. of Metal Research
2. Academia Sinica, Shenyang (China). Inst. of Corrosion and Protection of Metals

An evaluation was conducted of the corrosion behavior of 8090 aluminum-lithium (Al-Li) alloy (UNS A98090), when aged under various conditions and subjected to corrosion in a solution of 3.5% NaCl + 1% H[sub 2]O[sub 2]. Susceptibility to pitting, intergranular corrosion, and exfoliation corrosion was shown to be influenced by heat treatment, which reduced from natural aging, through overaging to peak aging, Materials with peak aging showed low corrosion resistance. The decreased corrosion resistance corresponded to decreased corrosion potential of the alloy. Insoluble constituents were susceptible to corrosion. The corrosion extended along grain boundaries. Al-Li alloys showed mismatched tensile strength and stress corrosion resistance. The growth rate of stress corrosion cracks was large in the peak-aged state. The growth rate was strengthened by overaging, but tensile strength was reduced. That problem was solved by retrogression and reaging processing.

• OSTI ID: 6051132
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 49:6; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AGING
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CORROSION
CORROSION RESISTANCE
CRACK PROPAGATION
CRACKS
DATA
EXPERIMENTAL DATA
GRAIN BOUNDARIES
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INFORMATION
INTERGRANULAR CORROSION
LITHIUM ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUMERICAL DATA
OXYGEN COMPOUNDS
PEROXIDES
PITTING CORROSION
SODIUM CHLORIDES
SODIUM COMPOUNDS
STRESS CORROSION
TENSILE PROPERTIES