Rinsing
In a dragout /rinsing process, is cold water effective or beneficial after a hot water rinse?
Q. In a dragout /rinsing process, is cold water effective or beneficial after a hot water rinse?—C.S.
A. Additional rises are almost always beneficial to remove the “contaminant,” whether it is residual cleaner, plating chemicals, etc. However, the final rinse is often the one that usually is reserved for the end of the line. This is because if you counterflow your rinse tanks, some of that heat will be picked up in the rinse tank it is flowing into. Additionally, heating the last tank can aid in the drying process, which is often necessary following most aqueous processing.
Related Content
-
Pretreatment of Black Oxide
Having issues achieving a consistent color with the application of black oxide? Start by looking at your pretreatment. Connor Callais of Hubbard-Hall offers advice for troubleshooting your black oxide process.
-
3-Stage Versus 5-Stage Washers
Columnist Rodger Talbert explains the difference between a five-stage washer and a three-stage washer, and how one provides better corrosion protection over the other.
-
Alkaline Cleaning Guide
Gregg Sanko, Senior Chemist, Oakite Products, Inc. provides an overview of the alkaline cleaning process.