Corrosion inhibition of metals (especialy iron, zinc, copper, tin and aluminium and in particular mild steel and the zinc surface of galvanised steel) is provided by treatment with an optionally substituted 2-hydroxy-5-alkylbenzaldoxime wherein the 5-alkyl group contains from 7 to 13 carbon atoms. The benzaldoxime may be applied directly or as a solution in an organic solvent or as an aqueous emulsion. The benzaldoxime may be formulated in a surface coating composition.
The invention discloses a process to inhibit corrosion of mild galvanised steel by treatment with an optionally substituted bis(oximinomethyl)atkyl phenol, especially 2,6-Dis(oximinomethyl)-4-nonyl or dodecyl phenols.
Anti-corrosion metal complex compositions and use thereof
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0206716A1
公开(公告)日:1986-12-30
A process for the inhibition of corrosion of metals which comprises treating the metal surface with a coating containing a hydroxy oxime metal complex preferably a zinc hydroxy- benzaldoxime complex such as the zinc complex of 5-nonyl--2-hydroxybenzaldoxime.
A composition containing a substituted cyclic anhydride and a hydroxy-oxime. The cyclic anhydride may be a succinic anhydride derivative such as dodecenyl succinic anhydride or a polymer containing cyclic anhydride groups such as polyisobutenyl succinic anhydride. The oxime may be 2-hydroxy-5-nonylbenzaldoxime or 2-hydroxy-5-nonylacetophenone oxime. The composition may be used to inhibit corrosion of metals, particularly iron. The composition may also include further components which are effective to reduce metal corrosion.
A composition comprises a poly(oxyalkylene)glycol derivative and a long chain anhydride and optionally a hydroxy-oxime. The long chain anhydride can be an alk(en)yl succinic anhydride in which the alk(en)yl group contains at least six carbon atoms. The optional hydroxy-oxime can be an alkyl-substituted benzaldoxime. The composition has improved corrosion resistance and can provide protection of a metal even in the form of a thin film.