How long after spawning is a tank immune from hostile fire?

[seasap 31]

I've noticed, when firing on a newly spawned tank, I score zero damage on them.  This immunity goes beyond the point of them switching from transparent to opaque.  Yet is seems they are able to fire at me and inflict damage.  Obviously, there is some period of time that they are immune to my hits.  How long are they immune?  Or is there some event on their part that ends their immune period?

[Spy 14,687]

As mentioned in our lovely Wiki;

"Immediately after the "ghost" phase of spawning is over, spawn protection will be activated. Spawn protection provides 100% protection from all damage, negative status effects, and impact force (only mines) for 2 seconds."

[pocrettttt 277]

After the spawm, you became a "ghost" that cannot interact with anything(except walls) for 1 seconds, after this, you become  Immunity 

 Immunity have 2s of duration, you cannot do damage to them ,or some negative status effect, but they can receive impact force by overdrives,turrets and blaster drone

So as soon as an enemy suddenly appears in front of you, you can't do anything against him for 3 seconds.

[Spy 14,687]

Answered, closed.