The Japanese characters are 焼杉板.
Literally, burnt "sugi" plank.
Sugi is the Japanese ceder tree, which is anyways insect and water resistant.
Perhaps the heat polymerizes the natural ceder resins? Or maybe the benefits are basically those of the wood itself.
Your mileage may vary if...
Anicdotally, here in Japan there are many old buildings (hundreds of years) with the charred finish still standing.
It was used extensively on "yagura", out buildings used to store valuable items.
My father in law's yagura has this finish, not sure how old it is.
The NTSB report on the Fern Hollow Bridge collapse in Pittsburg made the remarkable assertation that "rust makes metal weaker".
https://www.eng-tips.com/threads/pittsburgh-bridge-collapse.507081/
It seems that the State of Washington has been conducting a peer review test of this assertation...
The drawing looks to be from Germany (or one of the other German speaking countries).
"OX" is possibly from "Oxelösund" which once might have been an independent mill, but is now part of SSAB. https://www.ssab.com/en/news/2023/06/ssab-invests-in-green-transformation-of-production-in-oxelsund
Maybe if the fingers were more 3-dimensional. If they had a triangular cross-section then packages would be more likely to slide back down, onto the belt, instead of getting stuck on top of the fingers.
A rounded tip, instead of pointy, might also help.
Ok, the priming water comes from a pipe.
So the pump is the thing that looks like a tank?
And the other thing that looks like a tank is the motor?
And there aren't actually any tanks at all?
How, exactly, is the motor that overheats when it's not doing any work (no prime, no flow, no work)...
Assuming that the original alternator and the turbine were well matched.......
Then you'll need to look at the turbine performance charts and the controls to see how happy it will be running at about 75% of its "design" rating.
The turbine efficiency will likely drop a few percentage points...
And here you are asking strangers on the internet what to do.
It's your life. You need to take control of it. Stop waiting for others to do it for you.
The assessment for IP ratings is "protected against the harmful effects of....".
So if the valve "Worked perfectly before and after the test" then it passed, didn't it.
zirconium nitride can be sputtered.
zirconium oxide and zirconium carbide can be applied by CVD.
Do you need the thickness implied by weld overlay?
Do you need the ERZr-2 composition?
It's a fine mess.
I doubt that the applying new galvanized sheet over the existing rust would have worked. As 3DDave noted, it just becomes a place for mold to grow and other crap to accumulate.
Did whoever actually did the spraying wear any sort of respirator? Toxic nasty stuff in an...
In my many years of experience I've never heard the term "barycentric". I had to look it up.
The geometry leads to self-energization, which contributes to both the "crushing load", and if we guess that T0 is tension somewhere, that as well.
I guess that "construction drawing" is somewhere...
If we believe your earlier link, then I don't see any hydraulic backup for TE flaps.
I guess the mitigation is "you'll be landing fast, deal with it."
From the excellent b737 site http://www.b737.org.uk/hydraulics.htm
