Zinc Rot for what it is. - DA.C
 

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Old 03-07-2021, 09:09 PM   #1 (permalink)
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Default Zinc Rot for what it is.

Zinc rot is a quality control issue, plain and simple. Meanwhile as our models contort, distort, writhe in agony, and turn to dust, we watch passively and toss the carcass. Shouldn't those manufacturers involved accept a token of responsibility and if an affected model is returned to the manufacturer as proof positive, maybe offer a refund? Or are we just ungrateful slugs? Zinc rot doesn't happen often, but it's in the pour, and not from mishandling on our end. Over, Doug

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Old 03-08-2021, 12:00 PM   #2 (permalink)
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Default Re: Zinc Rot for what it is.

It's not just a quality control issue, as this is a problem with all diecast models. (I once collected diecast model cars and they too suffer from this issue. Model cars also suffer from paint rash. (Zinc being a porous material, even with all technical precautions taken, will sometimes release tiny bubbles of air that can potentially show on the surface of the paint. In some cases, it can be sanded and polished out.) Thus far, no one on the forum has complained about that issue with model planes, or if they have, I've not seen the thread.) High zinc content alloy doesn't need high-temperature to cast and flows relatively well to fill the correct shape. It is also cheap. This is why manufacturers use it. I'm uncertain, but I think it'd be difficult for a manufacturer to test or know whether a batch of metal being used is bad.

Sadly, it's a risk we all take when collecting diecast, just as we take a risk when collecting plastic, hoping it doesn't yellow over time.
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Old 03-08-2021, 12:26 PM   #3 (permalink)
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Default Re: Zinc Rot for what it is.

Quote:
Originally Posted by KLM4me View Post
It's not just a quality control issue, as this is a problem with all diecast models.
Yeah, but... Some diecast models, or even different runs of the same casting, are not affected by zinc rot. It's not a given, nor is it universal. That's why I think it's nothing more than quality control. As you say, zinc alloy is cheap, and in some cases, too cheap... Doug
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Old 03-08-2021, 01:01 PM   #4 (permalink)
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Default Re: Zinc Rot for what it is.

I totally get what you are saying Doug. It was disappointing watching my SMA Frontier 737 turn into pancake mix.
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