the present invention generally relates , in certain aspects , to corrosion inhibiting compositions useful for metalworking fluids , as well as concentrates , additives and metalworking fluids containing such compositions . the invention furthermore relates , in some aspects , to the use of such compositions for providing to a metalworking fluid one or more of anticorrosion performance , antifoam performance , antiwear performance , load carrying capacity , long fluid life , biological stability , lubricity , hard water tolerance , formulation stability .