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<div class="row"> <div class="col-xs-12 col-sm-12 col-md-9 col-lg-9"> <article class="ny-shuoming text-center"> <h1>铝板画表面腐蚀的因素有哪些åQ?</h1> <p>来源åQ?a href='http://www.187200.tw/news/66.html'>http://www.187200.tw/news/66.html</a>    å‘布旉™—´ : 2020-11-20</p> </article> <article class="info"> <div id="MyContent"> <div>铝板ç”ȝš„外表腐蚀原因是受åˆîCº†¾~éš™è…èš€ã€‚缝隙腐蚀的机理:是在¾~éš™å¤„发生了氧化复原反响。缝隙腐蚀发生的条件äؓ:①缝隙宽度在0.025ï½?.1mm范围内;②腐蚀介质的流动性差åQ›â‘¢å…ähœ‰ç”‰|žç”µä½å·®ã€‚凡是耐蚀性依托氧化膜或钝化膜的金属或合金åQŒæ ¼å¤–简单导致缝隙腐蚀åQŒè¿™æ˜¯å› ä¸ø™¿™¾cÀL°§åŒ–膜或钝化膜½Ž€å•è¢«é«˜æµ“度的氯化物或氢离子损坏,然后加快金属的溶解速度。因为此扚w˜²é”ˆé“æ¿çš„取舍是在7月末å’?月初的旱季,½Iºæ°”湿度高,防锈铝板的外表粗¾p™åº¦ä¹Ÿä¸é«˜ï¼Œå› è€Œå¾ˆèƒ½å¤Ÿåœ¨å¤–表残留了大量的水汽。在取舍½{‰åŠ å·¥è¿‡½E‹ä¸­å¤–表吔R™„的水汽没有充沛蒸发,加之裁剪之后堆积在一èµøP¼Œæ¿ä¸Žæ¿ä¹‹é—´å¿…定存åœ?.025ï½?.1mm的空隙,而且板与板之间紧压,水汽很难蒸发。在˜q™ç§æƒ…况下,ž®±å¾ˆèƒ½å¤Ÿå‘生¾~éš™è…èš€ã€‚尤其是寚w“ä¾æ‰˜é’åŒ–膜Al2O3来耐蚀的金属,其腐蚀产品主要是Al(OH)3。这æ ïLš„腐蚀几乎在所有的腐蚀介质(包含淡水)中都能够发生。介质中若含有氯¼›Õd­åQŒè…èš€ž®±æ›´ä¸ºæ•æ„Ÿã€?br /> <br /> 发生防锈铝板的外表腐蚀的另一个原因是发生了点腐蚀。铝在枯燥的大气中可生成厚度ä¸?nm摆布的非晶态氧化膜。测验成果显½Cºï¼Œè…èš€äº§å“ä¸Šå­˜åœ¨ç€å„种¼›Õd­åQŒå¦‚Cl-åQ?OH)-和杂质Fe3+½{‰ç¦»å­ã€‚Cl-是损坏钝态的¼›Õd­åQŒåœ¨å®ƒéƒ¨åˆ†è¿›å…¥å¤–表钝化膜æ—Óž¼Œä½‰K’åŒ–膜部分蜕变åQŒç”ŸæˆAl3+。Al3+同水中的(OH)-¾l“组成氢氧化物,则该处部分pH值降低变成酸性。生成Al3+时所释放的电子流到另外地址变成H+åQŒäؓ氧化剂复原的阴极反响所消耗。腐蚀坑长大的条äšg是溶液的‹¹“羃åQŒè¿™åœ¨è¿™½‹‡æ–‡ç« å‰–析的防锈铝板å‡ÞZñ”、存攄¡­‰çŽ¯å¢ƒä¸­çŽ°å·²å…·æœ‰ã€‚白色结晶状氢氧化物的堆¿U¯ã€é“æ‚质的存在等均加快了点腐蚀ã€?br /> <br /> 白斑是腐蚀前期的äñ”åQŒè€Œé»‘斑则是中后期产品åQŒå› è€Œå…¶åœ¨å…ƒç´ ä¸Šå­˜åœ¨ç€¾U¤ç»†çš„不同。中后期产品相对前期产品其元素成分要杂äؕ一些,杂质元素也多些ã€?br /> <br /></div> </div> <p class="text-left">相关标签åQ?a href='/key.aspx?k=%c2%c1%b0%e5%bb%ad%b1%ed%c3%e6%b8%af%ca%b4'>铝板画表面腐蚀</a>,</p> </article> <hr class="m-sx-40"/> <div class="text-left"><div>下一æ?<a href="65.html">铜板腐蚀厂家½Ž€˜q°é”»é“œæÕQ雕的三种保养的秘诀</a></div> </div> </div> <div class="col-xs-12 col-sm-12 col-md-3 col-lg-3"> <div class="ny-right"> <div class="row"> <div class="col-xs-12 col-sm-6 col-md-12 col-lg-12"> <h4 class="ny-h4">相关新闻<small>Related 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