How long should the three-way catalytic converter be soaked in oxalic acid?

[LaGabriel]

Soaking the three-way catalytic converter in oxalic acid for 30 minutes to 1 hour is sufficient, ensuring all areas are evenly soaked to avoid uneven treatment. The three-way catalytic converter transforms harmful gases such as carbon monoxide and hydrocarbons emitted from vehicle exhaust into harmless gases through oxidation and reduction reactions. When high-temperature exhaust gases pass through the purification device, the catalyst in the three-way catalytic converter enhances the activity of the harmful gases, promoting oxidation-reduction chemical reactions to purify the vehicle exhaust. Oxalic acid soaking can be used to remove rust from the three-way catalytic converter. However, caution is required as oxalic acid is highly corrosive to stainless steel. High-concentration oxalic acid can also easily corrode the skin, and the resulting acid oxalate salts are highly soluble and somewhat toxic. If skin comes into contact with oxalic acid, it should be rinsed with water immediately.