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21
Caution when cleaning exterior panel (stainless steel)
How to clean the rust state
Stain type initial rust
Since the initial rusted stainless steel surface itself is only slightly affected by the
stain, it can be returned to almost the original surface by selecting the neutral
detergent or a commercially available cleaning solution. If it is regularly cleaned at
a proper frequency, the state of the rust can stop at this stage and you can remove
the rust easily and cheaply.
Red Rust
If the initial rust is let for a long time, it will result in a thick brown rust that can
damage the stainless steel surface. In this condition, it is not east to remove the
rust, and the surface cannot be restored. Therefore, it is important to remove the
rust in the early stage of rusting.
If the rust is not removed by a commercial cleaning agent, it can be easily removed
by using a cleaning agent after removing some rust in advance with sandpaper or
a stainless steel brush. In this case, it is necessary to fix the surface by cleaning
and regrinding the surface.
Rust by iron powder
Rust by iron powder can occur due to welding spatter at the time of construction,
rust water flowing down from steel in the upper part of stainless steel, and rust
generated in contact with stainless steel and ordinary iron products during storage.
It should be removed with neutral detergent at the first sign of rusting. If the rusting
state is further developed, it should be removed with 15% nitric acid solution or
commercially available stainless steel cleaner.
Rust due to exhaust gas or acid
rain
Exhaust gas or acid rain, sometimes found in high traffic cities, may affect this unit.
Relatively light rusts can be cleaned with a neutral detergent or soapy water, but if
they get worse, they should be removed with 15% nitric acid solution or a
commercially available stainless steel cleaner.
Rust due to salt deposition
When exposed to sea breezes like a window frame or verandah railway pipe that
faces the ocean, the icemaker may experience red rust in a short time. To avoid red
ruse, ensure regular cleaning according to this manual.
Rust by disinfection and cleaning
agent
Chlorine-based disinfectants are used to disinfect water in places such as swimming
pools and bathrooms. In the case of chlorine-based cleaning agents such as ROX
used for cleaning toilets, etc., many chlorine compounds are attached to the surface
of stainless steel and can result in rusting. When chlorine- based disinfectants are
used, it is important to thoroughly wash them with water to ensure that no residue
remains. They must be removed with 15% nitric acid
solution or stainless steel cleaner.
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