How to Clean Rust From a Sink Drain Around a Flange

A pumice stone
••• pumice-stone image by Anatoly Tiplyashin from

Because water can pool in a sink, rust can build up on a drain flange and the surrounding porcelain. The solution is two-fold. The strategy for the porcelain is to find a substance that is harder than rust and softer than porcelain. Fortunately, pumice stones fit this description. As for the metal, the acid ingredient in cola that gives it a tangy flavor–phosphoric acid–can degrade the rust on the metal much faster than it etches the metal itself.

    Get some phosphoric acid at a home improvement store or a local chemical-supply store. Look for an 85 percent solution is ideal. You can dilute higher concentrations with distilled water. You can also use naval jelly, which has phosphoric acid. Cola might also work, if left overnight.

    Close the drain. In other words, lower the stopper.

    Use gloves and wet a piece of paper towel that will cover the rust stain on the drain metal.

    Dampen the paper towel with the phosphoric solution. Leave it on for a few minutes. Then pour a solution of baking soda and water onto the paper towel to neutralize it. Because you’re adding a base water to acid instead of acid to water, you’ll get an animated reaction.

    Raise the stopper and empty the sink. Brush the metal with a non-metal brush to get rid of any film left behind.

    Wet a pumice stone, which you can get from the beauty section of most any drug store.

    Scrape it against any porcelain that has rust on it. Use small strokes directly on the rust, like a pencil eraser. The rust will come right off the porcelain.

    Things You'll Need

    • Naval jelly
    • 85 percent solution, phosphoric acid
    • Gloves
    • Paper towel
    • Non-metallic brush
    • Pumice stone

Related Articles

Vinegar Experiment for Endothermic and Exothermic Reactions
How to Dissolve Steel
What Is the pH Level of Baking Soda?
How to Remove Acetone Residue
Why Does Citric Acid Clean Pennies?
How to Make Flash Paper
Vinegar Experiment for Endothermic and Exothermic Reactions
How to Neutralize Acids & Bases
How to Use Vinegar & Salt to Make a Penny Disappear
What Happens When You Put Gold in Muriatic Acid?
Why Does Soda Pop Clean Coins?
How to Dispose of Hydrogen Peroxide
If You Dilute Vinegar, How Will It Affect the pH Value?
How to Neutralize Muriatic Acid
How to Refine a Gold Smelt
How do I Melt Gold Out of Quartz?
What is Boric Acid Used For?
White Vinegar & Isopropyl Alcohol Uses
How to Dissolve EDTA in Water

Dont Go!

We Have More Great Sciencing Articles!