quiz12spr2000 - ENGSC 3313, Spring 2000 ~nswer any 4...

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Name Quiz 12 ENGSC 3313, Spring 2000 ~nswer any 4 Questions only, 1 point each 1 It is the reference by which everything else is compared. Cross country pipelines are more likely to corrode under riverbeds and under paved roads than elsewhere, if not properly protected. Reason why! 2 These would be oxygen deficient zone~, hence @Qili£ regions and anodes corrode. Oxygen partakes in cathodic reactions such as 02 + 2H20 + 4e- ~ 4(0H)" + - 02+4H +4e ~2H20 Thus high oxygen regions are cathodes 3 FIG. 14-2.6 Galvanic Microcells (AI-Si Alloy). Any two-phase alloy is more subject to corrosion than is a single-phase alloy. A two-phase alloy provides anodes and cathodes. (Courtesy of Aluminum Company of America.)
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t" . .f"". jt". . '.. -""" 4, What is this diagram that I showed on the overhead projector about? What have I marked out? Hint: Think Civil Engineering! CO-@ITION OF(ijE -1992) --see what I've outlined FlI"NCTIONALL Y ~/ DEFICIE~T,19% """" 108,000 --r- / / ~ v I , x x " / "" STRUCTh"RALLY ADEQUATE, 58%
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quiz12spr2000 - ENGSC 3313, Spring 2000 ~nswer any 4...

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