1 Scope
The objective of this document is to conduct a neutral salt spray test in accordance
with ISO 9227 . The test is a proven method for assessing the corrosion protection of coatings of
components such as bolts. For this reason, two coating variants were chosen for conducting
the tests on hexagon bolts with a size of M6 × 50. The bolts were examined at specified
points in time and the time of occurrence of grey veil, white rust and red rust was
documented. The corrosivity of the salt spray was determined by means of two methods
and also documented in an evaluation form. These two methods are the assessment of
the mass loss of an uncoated steel panel as specified in ISO 9227 as well as the determination of the time until appearance of red rust on hot-dip
galvanized steel panels in accordance with ISO 4042 and ISO 10683 .
The processing steps are specified in detail in a manual that was provided to the
test participants. If followed precisely, these instructions allow for a comparative
analysis of the results from the individual labs and make it possible to determine
the reproducibility of the salt spray test. Another objective is to compare the two
methods used ...