What is Happening to my MACH V EXTREME???

[Black-Gorrilla]

i dont know whats happening to this thing... it has like 5-6 dives on it since i got it new from scubatoys.... i wash all of my gear when i come home from diving, none of my gear ever sits overnight dirty... EVER...
well, i go out yesterday, do 2 dives, drive home , wash my stuff, take a shower (while all the mass amount of water runs of the gear) then i bring everything inside, pat it down with a towel, and leave everything on top of another towel to completely dry.
i wake up, start moving my stuff out to the backyard since it's sunny today, look at my wing and see this... (look at pics)

anyone know whats going on here?

the wing is mounted on a SS backplate, using plastic screws.






Thanks for any and all help ahead of time.

[cmburch]

It looks like corrosion from a poor quality rivet. The red/brown looks like iron from steel and the blue/white looks like copper from brass. Will it rub off with a damp cloth? I have the same one, but mine is hidden by my STA. PM Patrick at Oxycheq.

You're right about galvanic reaction. Why is the iron mainly on the ones with screws and not uniform. Most of the rivets without a screw look like a normal rinsing problem.

I think my Dive Rite STA has plastic on the SS bolts maybe to prevent this? Or just to make it more secure.

Good to know it is only cosmetic. I soak mine in the laundry room sink or bathtub then rinse with warm water when I am taking a shower. For me, most green build up from copper in brass is easily wiped off with a damp towel.

[MSilvia]

Could be galvanic corrosion. Are the grommets made with dissimilar metals?

[Black-Gorrilla]

it rubs off with a wet towel, but not too well. it still looks kinda funky after i rubbed it off, and not all of it came off.
is patrick on this forum? or you mean for me to e-mail him about it?

thanks.

[CompuDude]

I don't think he's on this forum. I'd email him.

[captain]

Galvanic action between dissimilar metals, the stainless plate and the brass grommet. Happens much faster in salt water than fresh. Not much other to do about it than washing and fast drying it. Part of the problem is salt water get in the webbing and between the grommet and bolt and is near impossible to wash out.

[Black-Gorrilla]

well, i emailed oxycheq and got a super fast answer... this is what it read
"The black finish has rubbed off of the brass grommets. The brass is
turning green. It will not impact the wing other than looking green."

[Black-Gorrilla]

Originally Posted by captain

Galvanic action between dissimilar metals, the stainless plate and the brass grommet. Happens much faster in salt water than fresh. Not much other to do about it than washing and fast drying it. Part of the problem is salt water get in the webbing and between the grommet and bolt and is near impossible to wash out.

it's not on the plate side, it's on the tank side.

[frogman159]

Just curious- Do you use an STA Or do you mount the tank directly against the wing?

[CompuDude]

Originally Posted by Black-Gorrilla

well, i emailed oxycheq and got a super fast answer... this is what it read
"The black finish has rubbed off of the brass grommets. The brass is
turning green. It will not impact the wing other than looking green."

There you go. Strictly cosmetic issue.

A little black nail polish (or perhaps even a sharpie), and you're back in business!