Recommended Corrosion Test Methods for Commercial Vehicle Components
This document establishes recommended practices to validate acceptable corrosion performance of metallic components
and assemblies used in medium truck, heavy truck, and bus and trailer applications. The focus of the document is
methods of accelerated testing and evaluation of results. A variety of test procedures are provided that are appropriate for
testing components at various locations on the vehicle. The procedures incorporate cyclic conditions including corrosive
chemicals, drying, humidity, and abrasive exposure. These procedures are intended to be effective in evaluating a variety
of corrosion mechanisms as listed in Table 2. Test duration may be adjusted to achieve any desired level of exposure.
Aggravating conditions such as joint rotation, mechanical stress, and temperature extremes are also considered.
This document does not address the chemistry of corrosion or methods of corrosion prevention. For information in these
areas, refer to SAE J447 or similar standard.
Rationale:Field experience indicates that many commercial vehicle components have less than acceptable corrosion performance.
Currently available vehicle corrosion standards are inadequate. In particular available standards do not provide suitable
coverage for new de-icing chemicals and application methods coming into wide spread use, no do they typically account
for aggravating effects such as temperature, abrasion, mechanical operation and variable conditions depending on
vehicle location. This document also provides methods of correlation and evaluation.