Stainless steel (SS) is expensive metal and therefore, needs care. The frequency and the extent of cleaning depend on the extent of usage and the condition.
i. Cleaning of soft deposits
Ordinary deposits like dirt, grease are cleaned with mild detergent (soap) and washed and dried.
ii. Hard deposit
However, hard deposits need different treatments such as rubbing/buffing withpolishing powder and SS brushes. Soft cloth or pads are used to shine the surface.Plastic sponge or fibrous brushes are also safe to use. Avoid iron wire brush (steel brush) and should never be used for rubbing. This brush will leave iron particles on S.S.surface, which will cause rust.
iii. Care with sanitizers
If Chlorides/Bromides/Iodides based chemicals used under acidic condition for long;there are greater chances of corrosion, hence should be washed properly.
iv. Care with salt solutions
These leave dirty spots on drying, hence should be washed after use. No paint or any coating is done on SS surface. Sometimes rust like appearance may occur which is due to some iron chip or part adhered on SS surface for cleaning. 5 to 15% caustic soda (hot or cold) is commonly used. Sometime 0.1 to 2.0% hot solutions of Sodium Metasilicate, tri-Sodium Hexa Metaphosphate, and Tetrasodium pyrophosphate, Sodium Tripolyphosphate are used as excellent removers.Organic solvents are sometimes used to remove oil, grease, paints or hard deposits.These organic solvents are ether, alcohol, kerosene, gasoline, etc. Highly adherent ink, paint, etc. can be removed by butyl acetate. For very heavy water deposits,15-20% nitric acid can be used with caution. Acid cleaning is followed by proper washing to remove any trace of acid.
i. Cleaning of soft deposits
Ordinary deposits like dirt, grease are cleaned with mild detergent (soap) and washed and dried.
ii. Hard deposit
However, hard deposits need different treatments such as rubbing/buffing withpolishing powder and SS brushes. Soft cloth or pads are used to shine the surface.Plastic sponge or fibrous brushes are also safe to use. Avoid iron wire brush (steel brush) and should never be used for rubbing. This brush will leave iron particles on S.S.surface, which will cause rust.
iii. Care with sanitizers
If Chlorides/Bromides/Iodides based chemicals used under acidic condition for long;there are greater chances of corrosion, hence should be washed properly.
iv. Care with salt solutions
These leave dirty spots on drying, hence should be washed after use. No paint or any coating is done on SS surface. Sometimes rust like appearance may occur which is due to some iron chip or part adhered on SS surface for cleaning. 5 to 15% caustic soda (hot or cold) is commonly used. Sometime 0.1 to 2.0% hot solutions of Sodium Metasilicate, tri-Sodium Hexa Metaphosphate, and Tetrasodium pyrophosphate, Sodium Tripolyphosphate are used as excellent removers.Organic solvents are sometimes used to remove oil, grease, paints or hard deposits.These organic solvents are ether, alcohol, kerosene, gasoline, etc. Highly adherent ink, paint, etc. can be removed by butyl acetate. For very heavy water deposits,15-20% nitric acid can be used with caution. Acid cleaning is followed by proper washing to remove any trace of acid.
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