David S. Peterson
Cleaning Titanium
Hypersolve is a brominated solvent. Can you tell me if this solvent is safe to use?
Read MoreUV Clean Coat Over Metal
Our question is whether rust sometimes occurs under the UV coating. Can you explain why some may rust quicker than others in a non-humid environment when routine maintenance is performed on all tanks and not all parts rust?
Read More“Banned” versus “Regulated”
I like the reference to “regulated” when it comes to federal requirements. Everyone seems to think these materials are “banned.”
Read MoreStripping nickel from Inconel 718
Could you please advise me of the best way to strip sulfamate nickel off of Inconel 718 base material? Is there a risk of damaging the part if it is stripped in 50% nickel due to the high nickel content of the base material?
Read MoreCleaning Aluminum Castings
I’d like to know what cleaning problems result in bad powder coating, or what tests we can do to ensure good cleaning.
Read MorePretreatments
What is the chemical used to seal after a three-stage cleaning process and higher?
Read MorePassivation of 17-4ph Stainless
In response to your Article “Passivation before Heat Treatment” in October 2007: Your second paragraph states “If the atmosphere in the furnace... etc”. Stainless steel should never be heat treated in an atmosphere.
Read MorePhosphating Process
We are in the process of setting up a pretreatment plant, and would like to know which phosphating process will be best, considering quality, investment, and maintenance for: 1) room temperature dicationic process, 2) tricationic process, and 3)high-temperature dicatonic process.
Read MoreRinse Tank Water PH
What effect, if any, will raising the temperature of RO water in a post-anodize, post-chromate rinse tank from ambient to 130°F have on the water’s pH value? Is there a way to rinse in hot RO water, max 130°F, and still be able to maintain a pH level on the part between 5.5 and 8.0 or the water in the rinse tank?
Read MoreSporadic Rust
We are experiencing a percolating rust problem, sometimes months after powder coat. When we peel off a blister, the rust has a definite mottled square pattern. We have not experienced a rust issue except for the seasonal heat and humidity but now have sporadic rusted parts all year round. Any thoughts?
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