battery connections

Steve
Try vaseline or another such product. I think you'll find the baking powder removes the residue but doesn't stop it reforming. The only trouble with vaseline is it gets pretty dirty from dust etc. and under hot conditions will melt away. I use a proprietary spay on which puts a dry coating over the terminals and lasts for months. Try Supercheap or Repco or another similar type auto shop
Peter

I use Lanox spray which seems to work ok for about 6 months. Much easier to clean off than those coloured sprays too.

G'daye,
The vaseline is the norm or grease and it will get dirty but continues with the job, but you can also put some felt rings which are available or just cut your own , melt vaseline into them and slip over terminals.
The spray is a good 1 too.
The felt rings are about 20mm bigger than the terminal. Available at most auto shops.
Still use the baking powder to wash off when necessary.
Don't worry, your not alone with this 1. :>)

The only stuff to use

http://www.crcindustries.com.au/catalogue.nsf/web_brands/Battery+Terminal+Protector?openDocument

G'day Steve,
I've been using the good ol'-fashioned petroleum jelly (vaseline) for as long as I can remember, and my battery terminals never, ever show any signs of corrosion....
Couple of "tricks", however.... Firstly, ya need to get 'em CLEAN!!
Now you mentioned baking powder.. This is actually a mix of sodium bi-carbonate (bi-carb soda), tartaric acid, and starch (usually in the form of rice flour)...
A far better choice is baking SODA, which is in fact, good ol' bi-carb soda...

Here's what I do... (if there's room in the engine bay, fine.. otherwise it may be better to remove the cable(s) from the vehicle & do it on the bench)...

Firstly, remove the clamp bolt completely from the terminal (this is important)..
then place terminal, bolt & nut in a container such as a jam tin or similar... now sprinkle a generous amount of bi-carb (like a couple of tablespoons or so.. the stuff is cheap) all over said terminal etc... now pour in some HOT water (the hotter the better), & watch it fizz!!!... the dirtier the terminal, the more the fizz....
repeat this excercise 'till ya get no more fizzin'... your terminal (& clamp bolt) should now be "squeaky clean"...
The battery posts can be cleaned w/- a "battery terminal cleaning thingo" and/or a wire brush....
Now give everything a light smear with the aforementioned vaseline...
IMPORTANT!!! >> Dont forget the clamp bolt, and the hole through which it goes, and particularly the "crevice" in between the mating surfaces... This is where the corrosion usually starts, & if you're thorough here, then you should have no further problems...
I usually re-coat everything any time I have the terminals removed for any reason, otherwise I never touch 'em, and my terminals are always clean....

Hope this helps :-)

Regards,
Ed. C.