Thanks for clearing this up wsm! That really sucks that i can't use potassium fluoride. (1)Is there any other non toxic additive as a replacement for dichromate? (2)What safetx measure should i take if i have to with it (if i can even get it)
(1) Not that I'm aware of, but I don't know everything. Maybe Mumbles is aware of something that may help.
(2) The idea of placing the cell in a tub, for a hazardous spill containment, might be a useful first step. Several have suggested and used the cement-mixing trays available from large box home centers, as a containment for a bucket cell. Having a water tight system without leaks is also highly recommended.
Having chemicals and materials on hand which can be used to neutralize or reuse the hexavalent chromium compounds for other purposes, is a good idea. Barium or lead chloride solutions can be used to create barium chromate or lead chromate precipitates, which can be removed by filtration. With potassium chromate solution (leftover from treating magnesium with K2Cr2O7), I once converted it with copper nitrate solution, to reddish-brown copper chromate which can be roasted in a covered crucible to form the expensive catalyst, black copper chromites.
Preparing the work space with a water-tight, disposable covering and possibly a spatter shield and fume hood with filter could prevent any air-borne particles from getting out (see Swede's preparations for plating LD on MMO, in his blogs). Some may feel this is overstating the actual hazards, but keeping hexavalent chromium out of the environment (especially groundwater) is no minor concern. Remember the movie, "Erin Brockovich"? It was based on real events in California, and made her wealthy (and famous).
Take dichromate contamination seriously, and work to prevent any sort of spill or leak.
Edited by WSM, 16 September 2017 - 06:30 PM.