Marble With Iron Oxidation

Yellow brown stains in white marble like carrara marble are almost always due to the oxidation and rusting of iron deposits that are embedded in the marble as described in this article above.

Marble with iron oxidation. I highly doubt it has anything to do with light sensitivity. In severe cases the process of oxidation is difficult to reverse or stop. The most common culprit for white marble turning yellow is iron which can be found in many natural stones. These marbles are usually brown or yellow because of the presence of iron oxide.

The rust stain simply returns as moisture brings more rust back to the surface. The same process is occurring with the iron in the marble. They are in the strict sense neither marble nor onyx for true onyx is a banded chalcedony composed largely of silicon dioxide. In extreme circumstances the marble can turn a brown color akin to what happens to a piece of iron left out in the rain.

This oxidation process is accelerated when the tile is saturated as in the flood in the above example. Onyx marble was the alabaster of the ancients but alabaster is now defined as gypsum a calcium sulfate rock. Iron stains however can be eliminated by mopping away water as accumulated in the marble tiles in order to prevent the iron from getting oxidized. This oxidation process is accelerated when the tile is saturated as in the flood in the above example.

If you expose a brand new nail to water and air it will turn brown and rust. In extreme circumstances the marble can turn a brown color akin to what happens to a piece of iron left out in the rain. In addition to the oxidation of internal iron compounds present in stone like pyrite fes 2 and siderite feco 3 1 2 contact with iron rich ground water when marble is used in for example garden fountains results in severe and unsightly discolouration. The same process is occurring with the iron in the marble.

Marble pigment iron oxide red powder find complete details about marble pigment iron oxide red powder marble pigment iron oxide red powder iron oxide red from pigment supplier or manufacturer hebei canri chemical co ltd. This process of oxidation is similar to the rusting of metal. Another cause is the proximity to iron metal which is oxidized by air in the. Oxidation is responsible for yellow brown stains that look like they are coming from the inside out.

If you expose a brand new nail to water and air it will turn brown and rust. Within marble is a naturally occurring percentage of iron and if the stone is exposed to high quantities of water a flood or leak or continuous moisture as inside a shower the iron will literally rust. When exposed to water acids or bleach the iron in the stone will begin to oxidize and turn it yellow.