How to Clean Rust From Stainless Steel?
According to the American Society for Metals: “Non-abrasive chemical treatments are preferred for initial rust removal to maintain surface integrity.”
Chemical methods
Use pickling paste or spray to assist the re-passivation of the rusted parts to form a chromium oxide film to restore the corrosion resistance. After pickling, to remove all contaminants and acid residues, it is very important to rinse with clean water properly. After all, treatments, re-polishing with polishing equipment, and sealing with polishing wax. For those with slight rust spots, you can also use a 1:1 gasoline and engine oil mixture to wipe off the rust spots with a clean cloth.
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Citric Acid Method
- 10% citric acid solution
- Apply for 15-30 minutes
- Rinse thoroughly with deionized water
- Safe for food-grade surfaces
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Phosphoric Acid Solution
- Specialized stainless steel cleaners
- Follow manufacturer’s instructions
- Ideal for moderate rust
Mechanical method
Sandblasting, using glass or ceramic particle shot blasting, annihilation, brushing, and polishing. It is possible to use mechanical methods to wipe off the contamination caused by previously removed materials, polishing materials, or oblivious materials. All kinds of pollution, especially foreign iron particles, can become a source of corrosion, especially in humid environments. Therefore, mechanically cleaned surfaces should be properly cleaned under dry conditions. The use of mechanical methods can only clean the surface, and cannot change the corrosion resistance of the material itself. Therefore, it is recommended to re-polishing with polishing equipment after mechanical cleaning and sealing with polishing wax.
Is 301 Stainless Steel Magnetic?
Light Surface Rust
- Non-abrasive Cleaning
- Soft cloth with mild detergent
- Rub in direction of grain
- Rinse thoroughly
- Dry completely
Stubborn Rust
For deeper oxidation:
- Fine-grit (400+) non-metallic pads
- Work in direction of grain
- Clean residue completely
- Apply passive layer protection