| 摘要 |
Compounds having N-oxide, quaternary ammonium, and/or betaine functionali ty according to formulas (1) - (4) are effective corrosion inhibitors, suitable for use in any of a variety of applications such as automotive cooling systems, heating boiler s, drilling of oil wells, and the handling, transportation and storage of crude petroleum a nd various petroleum fractions. See formula I The groups R1 - R5 may be certain hydrocarbyl groups. In formulas (1) and (3 ), R3 may also be (CH2)p-COO- in which p is either 1 or 2, and R2 may also be (CH2)p-COO- in formulas (3) and (4). In the compounds of formulas (1) and (2), R2 may al so be a polyhydroxyalkyl group of formula (A), shown below. <IMG>
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