Low-temperature sulfur corrosion environment is the most widely distributed

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In oil refining units, low-temperature sulfur corrosion environment is the most widely distributed and covers the most devices and parts. It is also the most common corrosion type. It relies on naturally occurring sulfides in crude oil and is distributed in low-temperature areas of almost all refinery units.: This kind of corrosion scenario exists from the overhead condensation system of the atmospheric and vacuum unit, to the top of the fractionation tower of the catalytic cracking unit, the effluent air cooler of the hydrogenation unit, to the absorption tower of the dry gas desulfurization, etc. It covers most of the equipment units in primary and secondary processing. It is the corrosion type that involves the most points in the daily anti-corrosion control of refineries. In contrast, high-temperature sulfur corrosion is only concentrated in high-temperature heavy oil areas above 240°C, and high-temperature hydrogen corrosion only exists in hydrogenation hydrogenation devices. The coverage of both is much smaller than that of low-temperature sulfur corrosion environments.