The role of surfactants in a cold sealing solution for anodic films on aluminium

Although the key in present cold seating solution formulation practice is the presence of nickel fluoride, its performance can be optimized through the use of other parameters. In particular the effect of surfactants has been studied as a means of providing better penetration into the pores of the nickel salts before incipient precipitation occurs. Non-ionic and anionic surfactants appear to be best, but the effect depends upon the type and concentration of surfactant used.