Corrosion Protection SAEJ2334 - HELP
Corrosion Protection SAEJ2334 - HELP
(OP)
I am investigating corrosion protection on an extruded component. We have steel end fittings that are extruded onto wire. This component is under the vehicle and must meet SAE J2334 test requirements as follows
1 year Appearance Requirement – 15 Cycles SAE J2334 – Immersion Method (1 rating max)
5 year Appearance Requirement – 60 Cycles SAE J2334 – Immersion Method (2 rating max)
10 year Appearance Requirement – 120 Cycles SAE J2334 – Immersion Method (4 rating max)
I currently coat with a phosphate and wax coating, which is easy to extrude on the dies. In the past, when I evaluated any type of zinc coating it gummed up the extruding dies and scraped off during extruding process. Can ant suggest any alternatives that would be easily manufacturable that wouldn’t gum up the dies or scrape off that would still be economical and meet my corrosion requirements? What are the advantages/disadvantages of using a phosphate and wax coating for corrosion protection. I need any information you would have on this as soon as you can. I appreciate any and all help.
Regards,
Chad
Product Engineer
1 year Appearance Requirement – 15 Cycles SAE J2334 – Immersion Method (1 rating max)
5 year Appearance Requirement – 60 Cycles SAE J2334 – Immersion Method (2 rating max)
10 year Appearance Requirement – 120 Cycles SAE J2334 – Immersion Method (4 rating max)
I currently coat with a phosphate and wax coating, which is easy to extrude on the dies. In the past, when I evaluated any type of zinc coating it gummed up the extruding dies and scraped off during extruding process. Can ant suggest any alternatives that would be easily manufacturable that wouldn’t gum up the dies or scrape off that would still be economical and meet my corrosion requirements? What are the advantages/disadvantages of using a phosphate and wax coating for corrosion protection. I need any information you would have on this as soon as you can. I appreciate any and all help.
Regards,
Chad
Product Engineer





RE: Corrosion Protection SAEJ2334 - HELP
Advantages: low cost
Disadvantages: poor corrosion resistance in environments containing chloride ions
RE: Corrosion Protection SAEJ2334 - HELP
My next step I guess would be to evaluate have the steel end fittings plated in some alternative coatings and running them through the extruder and testing to the specifications. Then evaluate the manufacturing process to see if there are any concerns with gumming up the dies.
Any thoughts???
RE: Corrosion Protection SAEJ2334 - HELP
RE: Corrosion Protection SAEJ2334 - HELP
You might be able to use a thick metallic layer (aluminium, nickel, copper) that will flow during extrusion, but that likely will abrade and cause contamination like the thin zinc layer did.
Is your extrusion process crucial? There are many ways to attach parts (staking, fasteners, welding, press fit, etc.). I don't see any way to meet the customer's requirements and keep your current process.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Corrosion Protection SAEJ2334 - HELP