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Corrosion Testing

Micom’s Corrosion testing laboratory offers numerous corrosion and material degradation testing services. Corrosion testing is often with the ASTM B117 test.

What is Corrosion?

Corrosion is the gradual destruction of materials (usually metals), by chemical reaction with their environment. Corrosion degrades the useful properties of materials and structures, including strength, appearance and permeability to liquids and gases.

Corrosion causes major losses in today’s society.  In 2002,  the Federal Highway Administration of the United States published a study on corrosion demonstrating that during 1998 in the United States, the direct costs associated with metal corrosion, were approximately 276 $ billion (about 3.2 % of the US gross domestic product at that time).

Corrosion Testing in a Material Testing Lab

Corrosion testing allows us to evaluate on an accelerated basis the efficiency of various coatings and improve the corrosion resistance of metallic parts. Since coatings can provide a high corrosion resistance through the intended life of the part in use, it is necessary to check corrosion resistance by other means. The numerous test methods are carried out on an accelerated basis. These tests produce corrosive attacks against the coated samples in order to predict the coatings’ suitability as a protective finish. The appearance of corrosion marks is evaluated at fixed time intervals.

The test duration in a lab depends on the expected product life expectancy in the real world. The longer the product is expected to last and perform, the longer the product needs to be tested in a material testing lab.

Salt spray testing, including the ASTM B117 test, is popular because it is a standardized test method providing good repeatability. It is inexpensive and quick to carry out.

There is, however, only limited correlation between the exposure duration and the expected life of a coating since corrosion is a very complicated process and can be influenced by many external factors.

Nevertheless, it is widely used in the industrial sector for the evaluation of corrosion resistance of finished surfaces or parts. To improve the correlation between corrosion as observed in real life and how it reacts in laboratory, cyclic corrosion test equipment and procedures were developed. For outdoor exposure, it is not uncommon to see 2000 hour exposures. Micom uses the most advanced corrosion testing machines in its material testing laboratories.

Micom is accredited by Standards Council of Canada to perform ASTM Tests

mobile astm

Micom is accredited by Standards Council of Canada to perform ASTM Tests

Other Related Test Methods to Corrosion Testing

For additional test methods related to Salt Spray Testing we invite you to read more about ASTM B117, cyclic corrosion, surface coatings and accelerated aging.

If you have any questions about corrosion testing, we invite you to contact us today. It will be our pleasure to answer your material testing questions and custom testing requirements.

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