Why Does Marble Rust

The aforementioned conditions plus the stone being subjected to excessive moisture can cause rust staining or also know as inorganic metal stains.

Why does marble rust.

Is red brown in color. Why does white marble turn yellow. Whether you re working to get stains out of an old neglected marble mantlepiece or rust stains out of a newer marble shower the method remains the same. Causes and cures and why we recommend white or very light marble never be used in a shower.

If water and or air is eliminated the iron will not oxidize. Rust is brittle fragile progressive and weakens iron and steel. A yellow brownish stain has begun to appear on the marble bench slab. If after 5 or 6 applications you don t get satisfactory results then you ll have to call in a professional to re surface the marble although the stain may be too deep for re surfacing to remove it.

If so use the rust stain remover product mentioned above. Why does white marble turn yellow. White marble tile especially carrara marble can contain small deposits of iron. Stainless steel contains chromium which forms an oxide much like how iron forms rust.

That is a natural element of the stone so it doesn t make the stone. To protect iron and its alloys from rust the surface needs to be separated from air and water. Rust consists of hydrated iron iii oxides fe 2 o 3 nh 2 o and iron iii oxide hydroxide feo oh fe oh 3. Iron deposits that are embedded in white marble tile especially carrara marble are typically the cause of this type of stain.

White carrara marbles are known to contain iron sulfide pyrite minerals. Now the marble would have to get somewhat saturated for this to happen. Rust is an iron oxide a usually reddish brown oxide formed by the reaction of iron and oxygen in the presence of water or air moisture several forms of rust are distinguishable both visually and by spectroscopy and form under different circumstances. The difference is the chromium oxide does not flake away so.

If water and or air is eliminated the iron will not oxidize. If water remains on the surface for hours it could absorb enough to rust. Coatings can be applied to iron. The same process is occurring with the iron in the marble.

If you expose a brand new nail to water and air it will turn brown and rust. If these deposits are exposed to water they can rust and leach through to the surface causing the yellow brown stains. If you expose a brand new nail to water and air it will turn brown and rust. Although specialized non acidic products can remove surface rust on marble or limestone the indwelling rust caused by constant induction of humidity mostly from the backside of the stone cannot be removed.

The same process is occurring with the iron in the marble. On non acid resistant stones like limestone or marble rust can be a non repairable problem. It started out faint has gotten brighter and appears to be growing. Marble is a porous material as is our skin and like our skin when we have a wound making a poultice to draw the stain out of your marble works in just the same way making a poultice to draw out infection in a wound would.