THE "CREVICE EFFECT" IN THE INHIBITING PROCESS OF ATMOSPHERIC CORROSION

Journal Article · Tue Nov 01 04:00:00 EST 1960 · Zhur. Priklad. Khim.

OSTI ID:4114114

Shreider, A V; Gintsberg, S A

The crack corrosion preventing action of various inhibitors during atmospheric attack, which is much less understood than similar processes in aqueous media, was investigated by exposing metal specimens, protected by wrapping with a paper saturated with inhibitor solutions, to attack by a corrosive atmosphere containing 0.1 mg/l of SO/sub 2/. During the tests the temperature was cycled from 20 to 40 deg C, while the humidity was kept between 94 and 96%. The effect of crevice formation was mocked-up by clamping together 0.1-mm-thick foils of the metal. The wrapping paper was saturated with an inhibitor, such as ammonium benzoate, dicyclohexyl ammonium chromate or nitrite, triethanolamine molybdate, or urotropin - NaNO/sub 2/. It was found that many inhibitors present a "crevice effect," resulting in the enhancement of the corrosive attack in the artificially imitated cracks and crevices because the inhibitors are not able to exert their action on the internal surfaces formed. Addition of surface-active agents, such as phenyl benzoate, phenyl oleate, or butyl benzoate to the volatile amines improved this situation. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-007716
• OSTI ID: 4114114
• Journal Information: Zhur. Priklad. Khim., Journal Name: Zhur. Priklad. Khim. Vol. Vol: 33
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

AMINES
AMMONIUM COMPOUNDS
ATMOSPHERE
CORROSION
CORROSION PROTECTION
HUMIDITY
IMPREGNATION
INHIBITION
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
NITRITES
ORGANIC COMPOUNDS
PAPER
SAMPLING
STERILIZATION
SULFUR OXIDES
WATER