For failure analysis, sometimes parts received contains fully rusted fracture surface and surrounding areas. Is there an acid solution out there for soaking the parts or spraying solution to the corroded area to remove the corrosion products and obtain a clean surface for analysis?
Dear Mohammad Sharear Kabir ,
There is a commercial product that might be useful, called "Ferroclean" that it is used to clean metallic parts. Another option might be the use of hydrochloric acid, or sulfuric acid as well in case you are in the lab.
Finally, I used to clean some stuff with an isopropanol and KOH solution (saturated in KOH), that worked really good with glass. Maybe you could try this one as well with the rust, but not fully sure if it will work that effectively.
Hope it helps!
PS: by the way, I heard that Coca-Cola or white vinegar might work too. Who knows right? Hahahah
Hi Mohammad Sharear Kabir ,
For rust removal the mentioned methods can be used,
Chemical based : products available in the market like WD-40, Dr.fixit Rust removal, Reebaklens RR, sika Rustoff 100... so on with steel wire brush to rub off the scaling. Its better to use to such products rather than using Acid like hydrochloric acids, due to safety reason, which required proper handling or it can be fatal.
Mechanical Rust removal : There are machines available to do the same job like sand blasting machine which can be give better productivity in larger areas (or) electric needle derusting machine also can be used which is commonly used in ships (marine industry).
Based on the quantity of area you can choose the methodology.
Hi Mohammad Sharear Kabir ,
In our laboratory we use hydrochloric acid with the addition of urotropine as a corrosion inhibitor. 10% HCl + 0.5% by weight of urotropine. We do it ourselves.
Best regards
Stefan Krakowiak
In our lab we use commercial products based on orthophosphoric acid. However, it should be remembered that after this a protective oxide film is created on the surface. If you need to examine the surface structure, this can be a problem.Recently I tried using a cheaper option - citric acid. It takes more time. However, there is an effect.
В нашей лаборатории мы также используем растворы ортофосфорной кислоты. Защитную оксидную пленку можно удалить.
Chemical based : products available in the market like WD-40, Dr.fixit Rust removal, Reebaklens RR, sika Rustoff 100... so on with steel wire brush to rub off the scaling. Its better to use to such products rather than using Acid like hydrochloric acids, due to safety reason, which required proper handling or it can be fatal. Mechanical Rust removal : There are machines available to do the same job like sand blasting machine which can be give better productivity in larger areas (or) electric needle derusting machine also can be used which is commonly used in ships (marine industry). Based on the quantity of area you can choose the methodology.
See: The removal of rust ... Practical Metallography 94 (1997) 4 p. 175 (online)
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