| 摘要 |
<p>The present invention relates to a corrosion inhibitor with respect to nonferrous metals and alloys thereof selected amongst allantoin and the derivatives thereof corresponding to the general formula: <CHEM> in which R<1>, R<2>, R<3>, R<5> and R<6>, being identical or different, represent a hydrogen atom, an alkyl, aryl or aralkyl radical, an alkali metal or an ammonium group, and R<4> represents a hydrogen atom or an alkyl, aryl or aralkyl radical. The corrosion inhibitor is useful in lubricating compositions, heat-transfer-fluid compositions, antifreeze or de-icing fluid compositions, hydraulic fluid compositions and brake fluid compositions. It is particularly useful for protecting aluminium and alloys thereof.</p> |
