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for Metal Finishing 1989-2025
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Remove hand sanitiser stains from hot dip galvanised material
Q. Please advise: as per the government instruction we have spread sanitiser on the hot dip galvanised material to kill pandemic virus Covid-19. Now what happened after two days later is we found etching mark (White dots) on the hot dip galvanised material.
- THANE, India
May 17, 2020
A. There seems no good reason to spread sanitiser on a zinc surface after galvanizing. Are you suggesting this virus will withstand the process?
Now to clean up after making this mistake:
A dilute solution of citric acid
⇦ this on
eBay
or
Amazon [affil links] followed by a water wash might work. Try a small area first. It works OK for standard white rust.
Is your customer claiming this material does not meet a quoted standard agreed with the galvanizer prior to order?
Geoff Crowley, galvanizing consultant
Crithwood Ltd.
Bathgate, Scotland, UK
September 1, 2020
adv.
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