Stainless Steel Product information

Stainless steel enjoys a reputation for long term appearance and integrity. The material is an extremely durable alloy but its surface is readily affected by contaminants combined with moisture which over time will lead to rusting.

The word “stainless” is a misnomer, because like all metals, stainless steel may become stained or discoloured over time, impairing its aesthetic look, and longevity. Incorrect specification and fabrication or subsequent handling in coastal environments may cause stainless steel to stain or discolour, impairing the overall look. This discolouration sometimes referred to as “tea staining” has been identified in coastal applications as surface contamination, and if left untreated will eventually penetrate into the stainless steel material and cause rusting.

Tea staining does not affect the structural integrity or the longevity of the material if treated in accordance with suppliers recommendations, and it can be controlled. It occurs most commonly within 5km of the surf or within a few hundred metres of a sheltered bay. The staining becomes progressively worse closer to a chlorine or salt source. Wind exposure capable of transporting dust and debris, as well as industrial pollution levels, and higher temperatures with high humidity, can create environments where staining may also occur 20kms from the sea. These same factors will cause even faster corrosion to alternate metals.

Keeping a pristine surface finish requires understanding, additional effort and usually additional costs. It is necessary to determine the correct grade of stainless steel at the time of initial planning for the proposed project, and maintenance recommendations will need to be followed after installation to result in problem free finish.

Appropriate grade selection

Limits for different alloys

Surface Finishes

Polishing

Cleaning and Maintenance

Installers Notes