AWS is a serious industry standard information source. According to them the chrome in stainless steel is the source of the color change. Getting rid of it will not stop it from coming back. Chrome (a major component of most Stainless Steel) is always oxidized on its surface. It is a reactive metal. Here is there take on the issue: This oxide layer [color on stainless steel] is not formed just by heating. In fact, such a layer is always present, and simply results from chemical interaction of chromium on the very surface of the steel with the oxygen in the air. If you were to scratch the surface or rub it with sandpaper you would "erase" this layer, but a new oxide film would form essentially instantaneously. This oxide layer is one of the things that makes stainless work. It forms a protective film that separates the steel from the corrosive effect of air, moisture, and other things on the outside. Of course, this layer can be penetrate or temporarily rubbed off, but it always comes back and always is the first line of defense.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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