How to remove rust from steel?
How to remove rust from steel?
Several standard mechanical and chemical methods are available for corrosion and rust removal from steel.
Mechanical Rust remover methods include hand sanding using abrasive material, abrasive paper, or metal wool; and powered mechanical sanding, grinding, and buffing, using abrasive mat, grinding wheels, sanding discs, and abrasive rubber mats.
The method used to remove rust from steel depends upon the metal and degree of corrosion.
One of the most familiar kinds of corrosion is red iron rust.
Red iron rust results from atmospheric oxidation of steel surfaces.
Some metal oxides protect the underlying base metal, but red rust is not a protective coating.
Its presence actually promotes additional attack by attracting moisture from the air and acts as a catalyst to promote additional corrosion.
CLEANING TO REMOVE FOREIGN MATTER BEFORE METAL RUST REMOVAL.
If the corroded area is soiled by foreign materials such as grease or dirt, the surfaces must be cleaned before stripping paint or removing corrosion. Surfaces may be cleaned in accordance with SSPC SP-1.
PAINT STRIPPING (WHEN REQUIRED).
Residual paint or primer may be removed by mechanical or chemical treatment after cleaning surfaces.
CORROSION & RUST REMOVAL.
Abrasive blasting is the preferred method of steel rust removal or for removing corrosion; other mechanical methods (SSPC SP-2 or SSPC SP-3) that may be used to remove rust are grinding, chipping, sanding, or wire brushing.
Chemical corrosion and rust remover may be used when there is no danger of the chemical becoming entrapped.
Chemical rust removers are of two types: acid or alkaline. The acid type can be used in removing rust and black oxide by immersion or brush application
see also:
What is the Best Rust Remover?
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