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Plating nuts and bolts

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Muzzer	11/05/2016 12:51:01
2904 forum posts 448 photos	Can't claim to be an expert on the subject but there's an interesting paper linked from the Wikipedia article that seems to be quite relevant. I know my company had a bad experience in the past with pressed steel components that fractured during fitting as a result of zinc plating without proper precautions. At least the problem doesn't grow during the service life of the part, it's there immediately after manufacture. The Wikipedia article refers to a bridge failure in 2013, despite the mechanism having been understood for over a century, so people are still being bitten by it. These days, the preferred coating for automotive fasteners is aluminium-zinc flake which is applied as a water-based coating that is then baked on, eg Deltatone. It's far superior to electro zinc in terms of corrosion, looks pretty good and doesn't cause hydrogen embrittlement. Murray
michael darby	22/07/2016 20:32:28
48 forum posts	"Stainless" is not always the answer. it does not suit some applications and not all "stainless " bolts purchased are what you expect to purchase. There is a lot of cr&p out there
Neil Wyatt	22/07/2016 20:40:16
19226 forum posts 749 photos 86 articles	Suggests to me that an hour at gas-mark 6 might be a recipe to please anyone worried about hydrogen embrittlement following electrolytic rust removal. Neil

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