December 12, 2017 2 Comments
Stainless steel comes in several grades of purity. All grades contain some iron, among other metals such as chromium, manganese, silicon, carbon and often nickel and molybdenum.
It is the inclusion of iron that gives rise to rust staining of the "stainless" steel if the protective layer of chromium oxide is damaged or there was not enough chromium included in the alloy.
There are over 150 grades of stainless steel and some are more prone to corrosion than others. Generally, the higher the chromium content, the less likely the steel will rust. However, given enough time, some rust will appear on most stainless steel
When the chromium in stainless steel is exposed to oxygen in the atmosphere it forms a thin and invisible layer of "chromium oxide". It is this invisible layer, which covers the entire surface, gives stainless steel its ability to resist stains and rust. And if this layer should be damaged, rust will form on the surface at the location of that damage.
The before and after photos (below) are of stainless steel handrails and bollards that were stained with rust.
This may have been caused by contamination from mild steel during fabrication, contamination during use, or by selecting a low grade of stainless steel.
We applied Benz Oxy Cleanze and left it to work for 2 hours at 4 ℃. We lightly rubbed the surface with a rag and then rinsed.
Quick tip: Sometimes, to be fully effective, Oxy Cleanze may require leaving longer and may require a second application.
We hope this information is helpful.
Ben, Leo & Fiona
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December 01, 2021 5 Comments
On the face of it, pressure/power washing bricks and clay roof tiles would seem to be the obvious way to clean them. But it's not that simple ...
Click the link on this page to discover the dangers inherent in pressure/power washing brickwork and clay roof tiles.
November 25, 2021
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