After reading the article I think I would agree that stainless steel hooks were better, however we must all strive to release Pike or any other fish for that matter without a hook in them. Education and instruction on hook removal is always going to be the top favourite but if you do have to leave a hook in a fish then why not a stainless one. I'm not going to rush out and replace all the hooks on my lures and traces to stainless overnight but I will certainly be buying stainless ones in future.
Of course there is always the option of using a single hook instead of a treble but that will no doubt detract from the 'steel or not' debate and open up yet another bucket of worms...
If it's refering to the article I think it is: I would say that the logic is seriously flawed and would result in an own goal and eventual environmental nightmare.
Imagine Non bio-degradable treble hooks: some lost and left lying around for millennia, waiting to snare swans and seabirds, creating a circle when that unfortunate animal dies (even of old age ) and subsequently decays.
Thank goodness such hooks don't exist, nor is there a market for them IMHO.
Current stainless hooks, even expensive top of the range Homosassa Tarpon fly-hooks will eventually rust after salt-water use despite a passivation layer of Chromium Oxide CR2O3.
There are many different stainless steels, I'm no expert but I assume the non-magnetic steels are most resistant to corrosion. I'd try a magnet on various S/S hooks to gather info.
I asked a diver earlier today and was told a top quality scuba-knife will last about a decade before really bad pitting sets in.
I've a good stainless sheath knife that I sometimes use to cut fresh whole beef tripe for the dogs. Despite wiping straight after use, remnant digestive juices seem to have stained the knife quite badly - but it hasn't corroded, yet.
I have some #4 gold plated trebles I aquired in Sweden (Baltic pike). They would fit the bill if you want to try some, but they have whisker barbs - crushing them would cause that part to corrode quickly just as it does in black nickel finished hooks.
Another anomaly would be if a weak 'cell' between the hook, wire trace and brass swivel were to occur. Depending on water conductivity, more than pH, corrosion would then increase dramatically (boats have sacrificial zinc anodes) - so many factors...
Education, and a switch to one big fine-wire barbless single hook, would seem logical alternatives.