摘要:
A process for pretreating a substrate is disclosed. The process includes applying a composition comprising a fluorescing agent to treat an area of the substrate. The treated substrate area is then rinsed to remove excess composition. The rinsed substrate area is exposed to an energy source whereby the fluorescing agent exhibits a color upon exposure to the energy source to detect excess composition remaining on the rinsed substrate.
摘要:
A rinse conditioner bath that comprises a Jernstedt salt and a soluble iron is disclosed. A method for treating a substrate with the disclosed rinse conditioner bath as well as a zinc phosphate solution is also disclosed.
摘要:
Disclosed are pretreatment compositions and associated methods for treating metal substrates with pretreatment compositions, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The pretreatment composition includes: (a) a group IIIB and/or IVB metal; (b) free fluorine; (c) a source of aluminum ions; and (d) water. The methods include contacting the metal substrates with the pretreatment composition.