1.1 This test method covers components of ferrous metal fastner assemblies, excluding those of stainless steel, such as fasteners, stress plates, and batten bars used in low slope roofing and waterproofing, to a sulfurous acid environment. This test method evaluates relative corrosion resistance of the components by determination of percentage of rust or white rust.

1.2 The components may or may not have a surface treatment applied.

1.3 A limiting factor is the subjectiveness when determining actual percentage of rust or white corrosion.

1.4 Other performance characteristics of ferrous metal components such as abrasion resistance of barrier coatings are not evaluated in this method.

1.5 This test method was developed based on Practice G 87.

1.6 The values stated in SI units are to be regarded as the standard. The inch-pound values given in parentheses may be approximate, and are presented for information purposes.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.