14 replies to this topic

[Bazza]

Hi

Can anyone tell me how the LJ bonnet hinges (and presumably all Holdens of that era) were finished? Galvanised, electroplated with some other material, bare metal etc etc. The springs seem to be finished in gloss grey paint but it is difficult to see what gives with the rest of the spring.

Would appreciate any advice thanks.

Bazza

[Bazza]

Thanks Bomber


Yep, it's hard to say just by looking - years of grit, grime and overspray and what all. There never seems to be much rust, I would have guessed galvanised.

I wonder what anyone else knows.

Cheers

Bazza

[Bazza]

Scooter


That's great and it makes sense. I have a 10/72 Adelaide car so I think I will go with galvanised with grey springs.

Thanks heaps

Bazza

[Bazza]

Thanks GM3300


I have a mirror stem being replated at the moment. I will ask him about the hinges when I pick it up.


Bazza

[Dangerous]

it would be worth your while to take the hinges to an
electroplater to confirm the exact type of plating. The
the term "galvanising" is often used to describe the
silver finish on automotive parts, usually it's zinc
plating. Galvanised parts have a much thicker
coating and are dull in colour, whereas zinc plating
is thin, the parts are brighter in apperance but don't weather
as well.
grant

Agree with this. Most plated parts of the Torana era were either zinc plated (silver finish which dulls off to a grey, eg the bonnet hinges, bonnet latch, boot latch, seat bolts) or passivated zinc plated which is a shinier gold finish (eg seat bolt washers, heater cable brackets) which doesn't dull of nearly as much.

Bazza, I have a very low km original 72 LJ sedan. The hinges appear to me to be zinc plated (silver finish), with grey painted springs. They are definitely not true 'galvanised', which is more what you'd see on exposed water pipes, metal fencing posts, outdoor building nuts and bolts, rain water tanks, etc.

[Bazza]

Thanks all.

I have cleaned up the hinges and they certainly have the colour of galvanised iron etc. But if I can't establish the original finish with an electroplater I think they are good enough to leave as is. The finish doesn't seem as heavy or thick as say, a exposed water pipe or a rain water tank.

Bazza

[Toranamat69]

Seems to be a bit of confusion regarding zinc plating above but galvanising and passivated zinc are both zinc coatings, just galvanising is applied by hot dipping which results in a lot thicker layer etc as prev described above and passivated zinc is via and electroplating process.
Dangerous is pretty much saying this above.

Even within Galvanising there is a fairly large variation in finish which can be achieved.
At work we buy a heap of big industrial radiators which are hot dip galv - the ones from germany are a really dull grey finish, whereas the ones from korea are really bright - almost HPC like finish. They both go duller after a while but the korean ones seem to stay a lot brighter looking.

[goxu1]

No grey paint on my springs ?

[Bazza]

Thanks

Bazza