Hi,
Is there any reason why we should not use 2 seperate panels instead of one large on for this CDT test.
Usually one panel will be immersed with holiday and the other half above the water source (vapour zone).
We have been supplied with 2 panels (not big enough to immerse and have a...
Wettability of the surface will generally increase with surface pre-treatment. (Acid / Alkaline etch, etc.) The alloys won't possess significant differences in adhesion as an untreated surface.
Czeilenga,
As per most failures that are related to powder coatings, the pre-treatment of the surface is generally the issue and should always be the first port of call.
You indicate that the substrate was rusty prior to application. Is this the case?
Have you used any chemical pre-treatment...
Jedward,
I suppose the end use and type of paint used is feasible. Did you calculate the CIELAB or are you making a visual comparison? What was the gloss retention of the coating like? Apologies for being so dismissive, I have a tendancy to focus on the abilities of powder coatings only, as per...
Has anyone ever done this test? If so, please could you forward a photograph of your set-up? Thank you.
"The purpose of this test is to determine if the sleeve has adequate resistance to shear stresses that might result from friction between the coating and the ground during pipe movement. The...
Cervantis, are where are you based?
Have you ever heard of 'Qualicoat'? This is an accepted standard in Europe & M.E. for architectural specifications. Some of the biggest manufacturers of PC are members, i.e. Jotun Powder Coatings UK/Thai/Dubai, Akzo Nobel Powder Coatings...
I seriously doubt that any coating would show no deterioration after 10k hours to Xenon Arc.
I don't know your end use, but powder coatings (PE) show very good resistance to natural sunlight. I am referring to architectural grades.
For future reference, you may check the 'fingerprint' of the...
Perhap's you should check the cabinets you are running. Do you run an interval clean down on your SS cabinets? How about the purity of the NaCl your buying in? We use analytical grade to ensure no trace of copper is in the salt. You must check the fallout rate of fog, chamber air temp...
Is the filiform corrosion evident at the aluminium interface, ali/plated interface or within the plating layer?
Perhaps a microscopic image would help.
Hello,
I am a coating's technologist currently handling a huge throughput of cathodic disbondment testing (CDT).
We are a UKAS approved laboratory for this test, i.e. we must maintain everything according to specification for the duration of the test.
I am seeking suggestions for the most apt...
