生鏽東西可否除鏽?如何做到?

Use lemon, salt and water to clean the object.

Steps:

1. Put slices of lemon into a kettle.
2. Add water and boil them together.
3. When the water boils, turn off the fire.
4. Soak the object in the water for few minutes.
(You can also wash the object with the water.)

OR

1. Dissolve some salt in a bowl of hot water.
2. Soak a lemon in the salt water for few minutes.
3. Use the lemon to wipe the surface of the object.
(You can also wash the object with the water.)


2011-08-04 10:54:27 補充：
Principle:

Lemon and salt can form dilute hydrochloric. Meanwhile, dilute hydrochloric acid reacts with rust (iron oxides) and the rust with disappear gradually by the chemical reaction:

Fe2O3+6HCl=2FeCl3+3H2O

p.s. Sulfuric acid can be used to clean the rust too~~

可以，浸入 dil. HCl
FeO + 2HCl ---> FeCl2 + H2O
Fe2O3 + 6HCl ---> 2FeCl3 + 3H2O