Archive for December 2010

what is the source of coloring in water having corrosion prodcts such as iron oxides or salts?

khalil g asked:


in a refinery ,there is a closed cooling system having distilled water and it has about 15 ppm total iron (corrosion product).the color of solution is brown .Is the color resulter fom iron oxide or another source?

Why is it that after dehydration of hydrates then adding water to the dehydrated salt the original color of so?

scottithan asked:


Why is it that after dehydration of hydrates then adding water to the dehydrated salt the original color of some hydrates return but others do not?