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[ Cautions for cleaning the external panels
(stainless steel) ]
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How to remove rust How to clean rusted parts
1. Rust spots in early stage
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Rust spots in early stage mean that the stainless steel itself is not severely affected,
so a mild detergent or any commercially available cleaning agent will restore the original
state. Rust will be removed with ease and at low cost if regular cleaning is done at
appropriate intervals.
2. Red rust
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Rust spots that are not removed after a short period of time will turn into thick reddish
brown rust and will damage the surface of the stainless steel. These are much harder to
remove and the surface will not be fully restored; thus, it is important to remove rust spots
early on.
If commercially available cleaning agents do not work, use sandpaper or a stainless steel
brush to remove the rust before applying the agent for easier removal.
This process requires treatment, such as refurbishment after cleaning.
3. Rust from iron
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Rust from coming into contact with welding spatter, rust from the metal bar above
the stainless steel part, or contact between the stainless steel parts and general metal
parts cause galvanic corrosion. This causes the metal to rust first, and it will eventually
cause the stainless steel to rust if it is not removed. As such, make sure to clean and
remove rust immediately with a mild detergent. However, when the rust has gotten really
bad, it must be removed with 15% nitric acid solution or commercially available stainless
steel cleaner.
4. Rust from exhaust gas or acid rain
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In environments, such as a factory complex or heavy transport sites, the product will
become contaminated in a short amount of time due to exhaust fumes or acid rain and rust
spots will quickly form. Light rust can be washed off with a mild detergent or soapy water,
but heavy rust will require 15% nitric acid solution or commercially available stainless steel
cleaner.
5. Rust from salt deposit
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In environments, such as porches of an apartment complex close to the seashore where
the product may be directly exposed to the sea winds, STS304 or STS316 will rust quicker
than normal.These cases require special treatment, such as using painted stainless steel
or regular cleaning.
6. Rusts from disinfectants or cleaning agents
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Sites, such as pools or public baths, that use chlorine-based agents to sterilize the water,
especially those for cleaning bathrooms, contain chlorine content that attaches to and
rusts the stainless steel surface. Thus, it is important to thoroughly wash off such agents
after using them, and a 15% nitric acid solution or commercially available stainless steel
cleaner are required for removing this type of rust.
