niki medium chain bag in suede 2d3a16aa celine nino small logo printed cowhide leather handbag old flower powder blue ostrich leather mini handbag with gold charm chain kate fendi lambswool baguette bag fendi first 12 christian dior 30 montaigne dior amber mini bucket blue bag for women s2319utzq m928 7 inches 18 cm6197 black grained calfskin celine pico stunning superfake handbag2534 women s everyday small camera bag in black 1b68d510 to luxury edition bags sly 1258061 christian dior medium dior book tote white multicolor for women womens handbags 14in 36cm cd9901 christian dior mini oblique canvas saddle bag in dubai louis vuitton 8211 premium quality designer bags 57667f5d medium lady d joy bag black cannage lambskin with gold finish butterfly studs1622 fendi sunshine mini replica miumiu top handles e0ae9c1c chanel 23p classic long wallet replica saint laurent vinyle round camera bag in grained matelasse leather white gold zealreplica ru zealreplicarucom celine medium ava strap bag in smooth calfskin coffee1888 women s hourglass small handbag crocodile embossed in navy 3675740a 为什么铝不容易生锈?_数理化之谜 - 棒子小说网
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为什么铝不容易生锈?

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为什么铝不容易生锈?

许多人都认为铝不容易生锈,事实上铝比铁还容易生锈!不过铝生锈仍是漂漂亮亮的,不像铁生了锈那样满shen是疤。金属生锈,本质上大多是金属被空气中的氧气氧化了。铁生锈后,生成的铁锈是疏松的,覆盖在铁的表面。不仅显而易见,而且氧气可以乘隙而入,继续氧化里层的铁,直至把一块铁全bu锈蚀完毕。铝却不然,铝很容易与氧气化合生成铝锈一一三氧化二铝,或简称氧化铝。氧化铝是层薄薄的致密wu质,仅0。00001毫米厚,它jinjin地贴在铝的表面,防止了铝继续与氧气化合。所以平时使用铝制品时,不宜用yingwumoca,以免损坏氧化mo保护层。

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