Field and accelerated tests of contact and volatile inhibitors of atmospheric corrosion with various metals

Abstract

The results of two-year field (in rural, urban, and marine atmospheres) and accelerated tests of contact and volatile inhibitors with steel, brass, and aluminum and magnesium alloys are reported. The protective values of contact inhibitors (IPKhAN-29a and IPKhAN-50) were found to decrease by 30 to 60% in all of the aforementioned atmospheres in already one year of the tests. In sealed polyethylene bags, metals and alloys retained high corrosion resistance both without and with volatile inhibitors, regardless of the inhibitor’s nature IPKhAN-110 and DAN). The protective value of contact inhibitors only slightly depends on the atmospheric corrosivity, though the latter increased from rural to marine according to the ratio 1∶1.4∶5.7. For the inhibited systems, the results of the field and accelerated tests were shown to correlate.