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Author Topic: Flash Rust Tank  (Read 767 times)

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Offline grumpy56

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Flash Rust Tank
« on: September 17, 2024, 03:47:05 PM »
Was surprised to see this flash rust in my CB400 tank. It seemed to just recently appear. Same thing on my GT380 although to a lesser degree. What is your recommendations for cleaning it and preventing it from happening again? Thanks.
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Offline Kelly E

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Re: Flash Rust Tank
« Reply #1 on: September 17, 2024, 03:51:47 PM »
I use EvapoRust to get rid of the rust and rinse several times with diesel. The diesel will prevent the flash rust until you use it. I just can't use water to rinse a derusted tank, it seems so wrong. 8)
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Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline grumpy56

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Re: Flash Rust Tank
« Reply #2 on: September 17, 2024, 08:02:15 PM »
Evapo-Rust does work well and it does seem wrong to slosh H2O in your de-rusted tank doesn't it!!!!
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Offline BenelliSEI

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Re: Flash Rust Tank
« Reply #3 on: September 18, 2024, 05:24:01 AM »
I rinse with a bit of diesel fuel mixed with Avery small amount of 2-stroke oil.
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Offline ZingZing

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Re: Flash Rust Tank
« Reply #4 on: September 18, 2024, 01:50:37 PM »
Vinegar is cheap and it works or you could also make your own evaporust at home.

To prevent rust in the future you could line it with POR-15 or something like that but that seems like a pain. If you're going to use the tank immediately I'd just fill it up and try to keep it filled as much as possible.
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Offline grumpy56

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Re: Flash Rust Tank
« Reply #5 on: September 23, 2024, 04:21:39 PM »
The rust inside rubs off with my finger. For now, I just put some Mystery oil in and filled the tank. Rust spots still there but I don't think they are going to cause a problem. I do have a see-thru fuel filter installed on the gas line. Do appreciate your comments.
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