[SML] GAC Quandary

[Maia Robbins-Zust]

Thanks Bill and Nigel!  Just knowing the term "white rust" is very
helpful as now I am finding all sorts of articles and sites devoted to
that subject.

Maia R-Z


On Wed, Dec 21, 2016 at 5:56 PM, Bill Sapsis via Stagecraft
<stagecraft at theatrical.net> wrote:
> Nigel, you may not be a rigger but your research is spot on.
>
> I am a rigger and I would concur with Nigel’s assessment if…a)  I could look
> at the cable and  b) I could take a couple lengths of it and have it pull
> tested by a professional lab.  Home made pull testing results won’t stand up
> in court.
>
> Finally, white rust, in my experience,  is not uncommon.
>
> Zat help?
>
> Bill S.
>
> bill at sapsis-rigging.com
> http://www.sapsis-rigging.com
> +1.267.278.4561   mobile
> +1.215.228.0888   x206
>
>
> On Dec 21, 2016, at 5:40 PM, Nigel Worsley via Stagecraft
> <stagecraft at theatrical.net> wrote:
>
> This document has lots of useful info
> https://www.tatasteelconstruction.com/static_files/Tata%20Steel/content/Brands/SAB/English/resources/White%20rust%20on%20galvanized%20and%20galvanized%20pre-painted%20steel.pdf
>
> In particular:
> "White rust is a complex, hydrated zinc carbonate/zinc hydroxide. It
> is a corrosion
> product of zinc formed under certain specific conditions of exposure."
>
> "Because of the large volume of white rust often apparent, it
> frequently gives the misleading impression of extensive corrosion.
> However, in the vast majority of cases,
> white rust does not indicate serious degradation of the zinc coating
> nor does it necessarily imply any likely reduction in the expected
> life of the product. "
>
> Sounds like it is fine, but I am not a rigger!
>
> Nigel Worsley
>
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