2. Red Rust
If the rust is left for a long time, it will result in thick brown rust and damage the
stainless steel surface. In this condition, it is not easy to remove the rust and the
surface cannot be restored, therefore it is important to remove the rust in the early
stage
of the 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 sand paper or a
stainless steel brush. In this case, it is necessary to repair the surface by cleaning and
regrinding.
3. Rust by iron powder
- Welding spatter at the time of construction, rust water flowing down from steel in the
upper part of stainless steel, rust generated in contact with stainless steel and ordinary
iron products during storage, corrosion of dissimilar metals due to potential difference
occurs, at the initial stage
steel rusts first and if kept as is it is the stainless steel itself
rusts. Therefore, it should be removed with neutral detergent at the beginning of
rusting stage. If the rust state has developed further, it should be removed with 15%
nitric acid solution or commercially available stainless steel cleaner.
4. Rust due to exhaust gas or acid rain
- It is easy to get dirty and spot rust due to exhaust gas or acid rain in the location
environment where there is a lot of traffic in a factory or city area. Relatively light rust
can be cleaned with a neutral
detergent or soapy water, but if it gets worse, it should
be removed with 15% nitric acid solution or a commercially available stainless steel
cleaner.
5. Rust due to salt deposition
When exposed to a sea breeze even STS304 makes red rust in a short time. In some
cases STS316 also rusts and rust progresses faster than in other areas. In this case,
painted stainless steel is used or special care is required such as regular cleaning.
6. 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 results in rusting in many cases. 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.
18
1. 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 a 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.
How to remove rust (cleaning)
How to clean the rust
Cautions when cleaning exterior panel
(stainless steel)
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