Corrosion resistance of low-alloy steels 20-KSKh, 07GBK, 06GBF, 13FKhA, 09GSF, and 20 with different
overall contents of corrosion-active nonmetallic inclusions (CANI) in process media for preparation and
drying moist casing-head gas is studied. A study in a model medium simulating seam water of the Khar’yagin
deposit, and in a moist hydrogen sulfi de atmosphere for ten days shows that a reduction in CANI reduces
the corrosion rate of low-alloy steels in a model medium compared with steel St20 by about a factor of two.
In a moist hydrogen sulfi de atmosphere after testing a steel 20 surface is coated with a uniform layer of
corrosion products; in low-alloy steels, corrosion damage occupies 1–7% of the overall area. The results
obtained agree with the role of CANI determined previously in developing overall and local corrosion.

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• MATERIALS SCIENCE AND CORROSION PROTECTION LOW-ALLOY STEEL CORROSION RESISTANCE IN NATURAL GAS PREPARATION PRODUCTION SOLUTIONS