Is nylon 66 susceptible to zinc salts?

[Winniepego]

Hello to everyone who's reading this.

I am new to the design engineering industry and I have been given a research project where I have to investigate if the Nylon 66 or other similar plastics are susceptible to Zinc salts? One of the design concepts is to combine a nylon 66 material combined with a DZR galvanised carbon steel product. Please place your thoughts and experiences, I'd be really appreciate your sharing! If you can direct me to some reading resources/references so I can have a good revision on this occasion.

If the Nylon 66 is susceptible to the zinc salts what other plastics can be substituted? The plastic must be water, chemical, UV, oxygen and heat (up to 150C) ressistant with a strong tensile and compression strength, with the ability to injection mould (i.e. a large thermal gap window).

 

[Pud]

Need much more info:

Water at 150°C? Duration?
Strong tensile and compressive? Relative term. How much stress?
UV? Nevada desert? Alaska?
Oxygen? What %?
A reinforced PPA might do the job, as might a bunch of other stuff.

And yes, nylon 6.6 does not like zinc salts.

H


www.tynevalleyplastics.co.uk

It's ok to soar like an eagle, but weasels don't get sucked into jet engines.

 

[CoryPad]

Acetal can be considered for that application

 

[Winniepego]

hi Pud,

It's a pipe fitting where the water can go up to 150C max at a short period of time (up to an hour). I use nylon 66 for its moisture/uv resistant ratio to tensile strength for the pipes.

Oxygen level would be in between 15-25%. UV is based in the Middle East and Asia climate the pipe fittings are increasingly sold there as well as within the Europe (obviously the weather climate is different here).

Tensile strength will be 15,000N max (combined with the galvanised carbon steel material) as I oftem work on the max level of tensile stress analysis of the materials.

Do you mind in where you'd get the reference of the nylon 6.6 susceptible to zinc salts from?

Thank you H

 

[btrueblood]

If in contact with hot water, then acetal won't work.

 

[CoryPad]

The fuller environmental description does show this to be a challenging application, where acetal would not be a great choice.

You can get a basic account of zinc salt attack of polyamides from the DuPont design guide:

http://plastics.dupont.com/plastics/pdflit/americas/zytel/232409d.pdf

Of course you could search Google Scholar, Scirus, Science Direct, and other technical sources to find journal articles, etc. that will provide the complete details.