Problem of unqualified gasoline corrosion resistance
Thread Content
The gasoline produced by the atmospheric-pressure unit passes the corrosion test after being washed in an alkali tank, but when tested again after passing through the deodorization tower, the corrosion level of the gasoline intended for distribution is found to be unsatisfactory. What could be the reason?
The reason for the failure of FCC gasoline in terms of copper sheet corrosion is corrosion caused by elemental sulfur; this elemental sulfur is formed as a result of the oxidation of sodium sulfide present in the alkaline substances carried by the gasoline by wind
As a supplementary point: in the actual production process, the fixed bed layer inevitably adsorbs certain substances such as gums present in gasoline, and these cannot be completely removed. As a result, the quality of the bed layer declines, the desulfurization and denaturation effects are not guaranteed, and this increases the likelihood of copper sheet corrosion issues in gasoline.
The issue of unqualified corrosion of copper sheets in gasoline can be addressed by using corrosion inhibitors