Aluminium corrosion testing shows the susceptibility of the tested sample to intergranular attack, pitting and/or exfoliation corrosion. Accurate measurements of the susceptibility to corrosion of a particular material allows engineers and manufacturers to ensure the material will perform to specified parameters.

Corrosion testing can be performed to a variety of specifications and or customer requirements. Most often, testing is done by immersion in solution. Corrosive immersions may be either acidic or basic, and will last anywhere from 6 to 96 hours. Once the immersion cycle is complete, the sample is analysed by visual inspection or mass loss evaluation.

Types of aluminum corrosion testing performed at Metaltest:

• ASTM G110 - Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride Plus Hydrogen Peroxide Solution. 
  • 2xxx series – 6 hour test.
  • 7xxx series – 6 hour test
• ASTM G67 - Determining the Susceptibility to Intergranular Corrosion of Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test)
  • 5xxx series – 24 hour test.
• ASTM G66 - Visual Assessment of Exfoliation Corrosion Susceptibility of Aluminum Alloys (ASSET Test)
  • 5xxx series – 24 hour test
• ASTM G34 - Exfoliation Corrosion Susceptibility (EXCO Test)
  • 2xxx series – 96 hour test
  • 7xxx series 48 hour test.