CUI vs Zinc Primer
CUI vs Zinc Primer
(OP)
Hi,
In a supply chain mix-up, the supplier delivered a high temp CUI primer instead of a silica-zinc primer. The lead times to get the correct coating is eight weeks while the equipment is scheduled to ship out in a week. Both primers are rated for 1000F while actual application will see a maximum of 120F on the coast in tropical environment. The device is a part of a fuel feed system that does not need insulation. Would both coatings provide similar resistance to corrosion?
Thank you.
In a supply chain mix-up, the supplier delivered a high temp CUI primer instead of a silica-zinc primer. The lead times to get the correct coating is eight weeks while the equipment is scheduled to ship out in a week. Both primers are rated for 1000F while actual application will see a maximum of 120F on the coast in tropical environment. The device is a part of a fuel feed system that does not need insulation. Would both coatings provide similar resistance to corrosion?
Thank you.
RE: CUI vs Zinc Primer
Does the CUI primer have good UV resistance?
Most coatings manufacturers have parallel lines of products. If your supplier can't provide the coating within your time requirements you may find a supplier with a similar coating that can.
On top of zinc-rich primer, include terms such as epoxy, surface tolerant and high build to help narrow down a suitable alternative.
Topcoating can provide UV resistance if your anti-corrosion coating can't provide it.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Primer base: Temperkote 1000 primer, DFT 125 μm (5.0-6.0 MILS/COAT), Total coats = 1
Link
Top Coat: Temperkote850 Alkyd Silicone resin, DFT 30 μm (1.2 MILS/COAT), Total coats = 2
Link
The primer should have been Temperkote zinc primer
Link
RE: CUI vs Zinc Primer
My understanding is that these products are not substitutes for each other. You can use the 1000 without the zinc but will not get as good of protection. You cannot use the zinc without the 1000, if my understanding is correct.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Check it out:
850Primer
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Indeed, and I’m pointing out that for the 850 topcoat, the OP needed the 850 Primer
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Do books like ASM Handbook, Volume 5B: Protective Organic Coatings do a good job of listing compatibility between different coating formulations? For example, if incompatible coatings may saponify or undergo cathodic debonding?
RE: CUI vs Zinc Primer
A reasonable first start for coating selection can be made from most of the major players' web sites such as Hempel
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Given the warning on the 850 datasheet, one would have to say yes, for that specific 850 formulation.
Why on earth are these coating systems being selected for an aggressive CX environment at a notional 48 deg C (not allowing for temperatures generated by solar radiation)?
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CUI vs Zinc Primer
RE: CUI vs Zinc Primer
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.