Tks corrosion question

[jetdriven]

I have noticed that TKS fluid corrodes the skin right behind the panel, I think the fluid runs down the Forward part of the wing and stops at the edge of the panel and puddles there but yes I've seen a lot of corrosion there compared to other parts of the air frame. My suggestion is to just rinse the Aircraft off with  fresh water before putting it away. 
when we do the test for the TKS system in the hanger for an annual, the windshield washer fluid gets  up on top of the cabin, but that stuff will sit there for three weeks and it won't move it evaporate.   Anything  that stays that long it's going to corrode. 
also, you guys better be checking that 1:3 manifold out 2/3 of the way on the wing, because the last plane we had that manifold was leaking and the fluid is running inside the wing and dripping out next to the main gear door but you don't want that stuff loose inside the plane. The manifold in the tail was leaking too, it would run down a Stringer  and then  corrode a steel bracket that held the down spring end  loop

 

 

[Fly Boomer]

21 minutes ago, jetdriven said:

I have noticed that TKS fluid corrodes the skin right behind the panel, I think the fluid runs down the Forward part of the wing and stops at the edge of the panel and puddles there but yes I've seen a lot of corrosion there compared to other parts of the air frame. My suggestion is to just rinse the Aircraft off with  fresh water before putting it away. 
when we do the test for the TKS system in the hanger for an annual, the windshield washer fluid gets  up on top of the cabin, but that stuff will sit there for three weeks and it won't move it evaporate.   Anything  that stays that long it's going to corrode. 
also, you guys better be checking that 1:3 manifold out 2/3 of the way on the wing, because the last plane we had that manifold was leaking and the fluid is running inside the wing and dripping out next to the main gear door but you don't want that stuff loose inside the plane. The manifold in the tail was leaking too, it would run down a Stringer  and then  corrode a steel bracket that held the down spring end  loop

 

 

The fluid makers claim it does not corrode metal, so is this damage caused by the fact that the fluid attracts water?

[jetdriven]

Either way.  TKS planes get corrosion in wetted areas 

[carusoam]

1 hour ago, Fly Boomer said:

The fluid makers claim it does not corrode metal, so is this damage caused by the fact that the fluid attracts water?

Sounds like a technicality…

The fluid itself doesn’t cause corrosion…

But it sure can hold water in it…

Best to not have leaks…

Pp thoughts only, not a mechanic or chemist…

Best regards,

-a-

[carusoam]

2 hours ago, jetdriven said:

I have noticed that TKS fluid corrodes the skin right behind the panel, I think the fluid runs down the Forward part of the wing and stops at the edge of the panel and puddles there but yes I've seen a lot of corrosion there compared to other parts of the air frame. My suggestion is to just rinse the Aircraft off with  fresh water before putting it away. 
when we do the test for the TKS system in the hanger for an annual, the windshield washer fluid gets  up on top of the cabin, but that stuff will sit there for three weeks and it won't move it evaporate.   Anything  that stays that long it's going to corrode. 
also, you guys better be checking that 1:3 manifold out 2/3 of the way on the wing, because the last plane we had that manifold was leaking and the fluid is running inside the wing and dripping out next to the main gear door but you don't want that stuff loose inside the plane. The manifold in the tail was leaking too, it would run down a Stringer  and then  corrode a steel bracket that held the down spring end  loop

 

 

I added the bolding to this step….

So it stands out as a memory item…

 

TKS is a great system, but comes with a couple of best practices to adhere to… for best results…

 

Best regards,

-a-

[Fly Boomer]

11 hours ago, jetdriven said:

Either way.  TKS planes get corrosion in wetted areas 

Rinsing with water is easy enough, but what can I do about fluid that ends up inside the wing or fuselage?  It seems to accumulate in the tail -- maybe because there is TKS-fluid-laden air swirling around the empennage and there are places for it to enter.

[Igor_U]

On 3/6/2023 at 4:50 AM, hwarnat said:

Corrosion at the edges of all TKS panels, wings and elevator. Aftermarket TKS installation 1995 on a 1990 Bravo. An extra 5k during the current annual. Lets hope it will hold for some time. The shop removed the corrosion, and injected some sealing under the edges of the TKS panels. The panels were not removed.

Thank you for posting this.

It might be too late but I question shop's decision not to remove TKS panels. It seems too me from your pictures there's some gap between the skins and the panels that are not sealed and fluid and moisture could enter it and create corrosion you can't see. You said they injected sealant under the edges of the panel which tells me moisture could enter as well. Perhaps they loosen the panels to do that.

[jetdriven]

yikes that looks pretty scary. the panels are glued in and often break when removing. And there may be skin replacement here, and it going to get horrifyingly expensive quickly.