Is this a bright shining vintage or a rusty old classic blade?
Anything that will seriously sterilize a blade will cause corrosion.
That corrosion must be managed and eliminated.
Barbicide will sanitize a blade quite well.
It like all other chemicals needs to be rinsed off
and the blade oiled. Read the directions.
When sanding a blade that is pitted and rusty
all crud needs to be cleaned off. Sanding with
soapy water and relentless rinsing is a good thing.
Fine sanding with bleach and peroxide is sterilizing
and rust promoting. Once you get down to bright steel the surface is
gosh durn clean. A rinse in alcohol or barbicide followed by a
light oiling to prevent rust is always the last step.
One of the saving graces with old blades is shelf time.
Viruses and bacteria do not stay viable on surfaces
for weeks/ years (except down in the crud). Some
razor found in a dung pile out back of a farm house
needs to be cleaned if only of tetanus. No eBay auction
will tell you a history like that...
Because steel is not a terribly porous media and because of
abrasion when stropping and honing combined with
the soap and water of a good shave prep
razors are cleaner than one might think.
I am of the opinion that hepatitis alone is too big a risk
to not fully sanitize a new to me blade.
Do not share kit.