In applications, aesthetic and performance requirements must be balenced
against budget and considerations for cost effective material specification. The
guide lines listed here assume that corrosion staining of stainless steel is
aesthetically unacceptable even if there is no structural deterioration.
Identifying stainless steel that meets this aesthetic standard (BS10088 part 1 page 19 ) and is cost effective requires evaluation of
the site environment, weather, finish, design, and probable maintenance
Mister Stainless / Mister Stainless UK was developed and based on
practical experience and atmospheric exposure studies. Evaluating a site and
application can be complex. Nearby sites can have different requirements due to
localised conditions or microclimates. The decision should be viewed as a
guideline that generates an initial evaluation of stainless steel requirements.
It is not a precise scientific determination.
If the design characteristics, maintenance schedules, or exposures of
different components vary significantly, a new procedure should be determined
for each component. If the presence of corrrosive pollution or salt (chlorides)
can not be determined by site examination alone, a laboratory could test the
surface of an unwashed sample from the site. The sample must have had long-term
exposure without cleaning. Care must be taken during sample collection and
handling to prevent removal of surface deposits.
Stainless Steel expert
When do I need a stainless steel expert? If there is any
uncertainty that a location appears to be corrosive. A stainless steel corrosion
expert should evaluate the site to an appropriate cleaning procedure.
Particularly corrosive conditions include:
sea water, or deicing salt splashing, or salt spray
High industrial or urban pollution levels
Hot, humid locations with salt or pollution exposure and very low rainfall.