Which Solvents to Use
Although I know each solvent has its own evaporation rate and solvent power, why do most formulators use more than two types. For example, why would toluene, MEK, MIBK, xylene be used in one paint formulation? Couldn’t I get a specific evaporation rate, viscosity, sprayability, VOC’s, etc. by just using MIBK and MEK? Or are xylene, toluene or other solvents having more of a major play in a formulation than a carrier?
Silicone
What would be the appropriate solvent to preclean aluminum surfaces to assure they are free of silicone prior to painting?
Phosphate Cleaning Systems
The issues I currently have are as follows: (1) I have a pH level of 2.0, that I think is causing flash rust to occur and in turn some slight delamination of paint during scribe testing. What is suggested to control pH? (2) I’ve read that when cleaning you should wash from bottom to top; this seems counter-intuitive to me. Can someone explain? (3) I’m sure the wheel has been invented on controls and work instructions for manual phosphating so does anyone have any links to a location that I can get our’s off of? (4) Does the metal temperature need to reach a certain temperature for the coating reaction to take place or only the solution?
Hydrogen Embrittlement Problems
We are buying screws according to customers specs. The manufactured parts then go through the following steps: remove the copper, heat treatment, and passivation. After all this, the parts come to the final test. The result is hydrogen embrittlement which now means that the parts are scrap. What can be the reason of this problem and is there a change to retreat the parts?
Thickener For Nitric Acid
My question is to find one thickener for nitric + HF acid solution for cleaning the stainless steel.
Cleaning in the 60s
Question:
You’ve probably seen this question/issue pop up frequently.
Precleaning for Laser
Question:
We produce some small parts of CDA 798-2 Nickel-Silver that require laser stenciling.
Alumina
Question:
What chemical can be used to remove dried alumina powder from stainless steel?
Cleaning the Mold Release Agent Off of Aluminum Castings
Question:
We are trying to clean the mold release agent off the aluminum castings we purchase.