ASTM A588 yog txuam nrog tooj liab (Cu), chromium (tsib), thiab phosphorus (piv txwv li, 0.00-00 cu, 0.40-0.65% cr). Thaum raug rau ib puag ncig ib puag ncig (huab cua, ya raws, cov pa paug me me), cov alloys hnov mob nrog cov pa thiab dej los ua aRuaj, adherent oxide txheej (patina)ntawm cov hlau nto. Tsis zoo li xoob, flaky xeb ntawm cov pa roj carbon, noo noo, noo noo, thiab corrosive ions (piv txwv li, chloride los ntawm cov ntsev tsuag). PATINA SELD -} g, khawb, kos), txhawb nqa ntev {9} lub sij hawm} lub sij hawm corrosion.
Nyob rau hauv cov atmospheric ib puag ncig (piv txwv li, nyob deb nroog, lossis qis - muaj cov chaw muaj), ASTM A588's Corrosion tus nqi yog0.01-0.05 hli ib xyoos-} 80-95% qis dua li cov pa roj carbon hlau (0.1-0.3 mm / xyoo). Qhov sib txawv no txawm ntau dua tshaj tawm hauv cov chaw muaj teeb meem (piv txwv li cov pa hluav taws xob nrog lub kaum hli ntuj Lub qeeb, khov kho corrosion ua kom cov steel khaws cov qauv txheej txheem rau 20-50 xyoo (piv txwv li, rov qab ua rau cov pa hlau.
Dog dig carbon steel yog nquag raupitting corrosion(Hauv zos, tob xeb xeb qhov tshwm sim los ntawm concentrated corrosive cov neeg sawv cev) thiab crevice corrosion (corrosion hauv nruj sib tsoo, piv txwv li ntawm cov pob qij txha nruj). ASTM A588 Zam kev coj tus cwj pwm no vim nws cov hlau sib xyaw ua ke ntawm CU thiab ua rau muaj kev sib txuas lus hauv nroog Hloov chaw tsis ncaj, txheej txheem - puas muaj xeb, astm A588 undergoesUniform nto corrosion-} thickness poob yog sib xws nyob rau hauv cov khoom, ua kev ua yeeb yam tau pom zoo thiab txo qhov kev pheej hmoo ntawm kev pheej hmoo ntawm kev pheej hmoo ntawm kev ua tsis tiav.
Thaum tsis tag tawm tsam kev ua kom huv (xws li
Atmospheric raug: Txuj ci nyob hauv nroog, nroog nroog, thiab cov nroog ib puag ncig (nrog rau thaj chaw uas muaj cov hniav khaus me me lossis hmoov av).
Marine Coastal Qhov Chaw (1-5 Km Island): Ua kom tawm ntsev tsuag tsuag corrosion zoo dua li cov ntaub hlau, raws li Patina blocks chloride ion nkag.
Muaj cov aav (tsawg mus rau nruab nrab emissions): Tolates cov sulfur me me dulfur dioxide (so₂) thiab ua kom muaj kuab paug yam tsis muaj kev nrawm nrawm.
Lub Neej Cua Txias thiab Huab Cua Huab Cua: Tswj kev tiv thaiv Patina Stability txawm nyob rau hauv high - noo noo los yog ntug dej nag lossis dej hiav txwv av noo).
