I am considering labware options to handle NaOH solutions at ~150 °C. One appealing idea would be to coat my current glassware with gold. I've read different sources mentioning the possibility without further detail.
The most detailed description of a process for this is INSTRUCTIONS FOR GOLD PLATING ON GLASS by Peacock Laboratories, Inc who sells (or used to sell) products for doing so. Unfortunately, this says little as to the chemical mechanisms involved.
Would anyone guess what chemicals are being used in this process and know how to explain the mechanisms at hand, and perhaps describe properties to expect from the result?
Can I expect impermeability from the coating or at least a significantly reduced glass surface exposure to hydroxides? What is the best resistance to expect vs routine cleaning of glassware that would be coated with such a method? Can I expect it to not dissociate upon heat shocks that borosilicate glass can handle? Would there be any chemicals to avoid with such a coating, other than the few that would be expected to react with / dissolve gold metal?