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Flash Rush in tank. Help

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01 Jun 2007 12:35 #145530 by pyxen
Replied by pyxen on topic Flash Rush in tank. Help
When I did my tank I used CLR (phosphoric acid), then a nice mix of dish detergent and water to wash it out, then some gas-line antifreeze to get the water out. It worked really nicely. Once that was drained, I WD40'd it, and left it til I was ready to fill with gas.. Haven't had any trouble.

84 KZ550-F2 LTD
93 ZR550-B4

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01 Jun 2007 18:07 #145586 by KZQ
Replied by KZQ on topic Flash Rush in tank. Help
WD40 will do the trick. I've never had the problem you're describing but I do know that whenever I have to leave a table saw on a jobsite WD40 will protect it from rusting till I get back to it.

You know, the phosphoric acid is only about 15% as strong as the muriatic acid. (Strong is a way relative term because all these acids are diluted to different concentrations before we start dumping them in our tanks. As a matter of fact muriatic acid is a strange term in it's own rite. Muriatic acid is the name that given to hydrochloric acid, at 20% dilution, that is commonly used to clean masonry.) My point is that the process where by Phosphoric acid attacks the steel tank and leaves you with an iron phosphate coating takes several hours even four hours is not excessive. It's the iron phosphate coating on the inside of the tank that gives the corrosion resistance needed to dry the tank without flash rusting.

KZCSI

www.KZ1300.com
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1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
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1985 ZN1300

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03 Jun 2007 10:12 #145868 by cuddies
Replied by cuddies on topic Flash Rush in tank. Help
So are you guys suggesting that I spray it with WD-40 after I rinse out the Muratic acid?

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03 Jun 2007 10:18 #145873 by KZQ
Replied by KZQ on topic Flash Rush in tank. Help
No. Use the muriatic then the phosphoric and finally use the WD40 to displace the water after you've rinsed out the phosphoric acid.

kzcsi

www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300

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03 Jun 2007 13:44 #145931 by KZQ
Replied by KZQ on topic Flash Rush in tank. Help
I'm doing another one today first wash with muriatic removed all the rust I could see but heated it up enough to reveal that there was some oily varnish hidden in the seams that I'll need to wash out first. I'll come back with some acetone and then try the acid again. I'll post the results in a few hours.

kzcsi

www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
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1985 ZN1300

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03 Jun 2007 17:42 #146007 by KZQ
Replied by KZQ on topic Flash Rush in tank. Help
Patton's suggestion was a great one. I used the muriatic acid, followed it with the phosphoric acid and immediately coated the inside with WD40. I then rinsed out the phosphoric acid with a garden hose and one more application of WD40 and here's the result.

What looks to be fine cracks are a few dog hairs that were on the rag I used to dry off the WD40.

KZCSI


www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300
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