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src="https://tyunfile.71360.com/UploadFile/szztjs/637447649953989599/9862682.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ckgstza" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>安徽省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>通用電子電器配件鋁鈍化哪家好,鋁合金皮膜代加工</p><p><span>***更新：</span>2021-02-07 03:17:28</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ugctpqr" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蘇州展圖金屬科技有限公司</a></p><p><span>聯(lián)系人：</span>王開永</p><p><span>郵箱: </span>John-05133@163.com</p><p><span>電話: </span>18351251659</p><p><span>傳真: </span>0512_57618831</p><p><span>網(wǎng)址: </span>http://szztjs.shop.88360.com</p><p><span>手機(jī): </span>0512-57618830</p><p><span>地址: </span>玉山鎮(zhèn)昆山國際模具城模具制造區(qū)17號(hào)樓13室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="szpgmde" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="zmdul3v" class="box"><p><p style="text-indent:25px">金屬表面的鈍化膜是什么結(jié)構(gòu)，是相膜還是吸附性膜呢？目前主要有兩種學(xué)說，即成相膜理論和吸附理論。成相膜理論認(rèn)為，當(dāng)鋁合金等金屬溶解時(shí)，通用電子電器配件鋁鈍化哪家好，處在鈍化條件下，在表面生成緊密的、復(fù)蓋性良好的固態(tài)物質(zhì)，這種物質(zhì)形成的相，稱為鈍化膜或稱成相膜，此膜將金屬表面和溶液機(jī)械地隔離開，使金屬的溶解速度降低，而呈鈍態(tài)。實(shí)驗(yàn)證據(jù)是在某些鈍化的金屬表面上，通用電子電器配件鋁鈍化哪家好，可看到成相膜的存在，并能測(cè)其厚度和組成。如采用某種能夠溶解金屬而與氧化膜不起作用的試劑，小心地溶解除去膜下的金屬，就可分離出能看見的鈍化膜，鈍化膜是怎樣形成的？當(dāng)金屬陽極溶解時(shí)，其周圍附近的溶液層成分發(fā)生了變化。一方面，溶解下來的金屬離子因擴(kuò)散速度不夠快（溶解速度快）而有所積累。另一方面，界面層中的氫離子也要向陰極遷移，通用電子電器配件鋁鈍化哪家好，溶液中的負(fù)離子（包括OH-）向陽極遷移。三價(jià)鉻鈍化劑是目前性能較為穩(wěn)定、效果較好，毒性很小的鈍化劑。通用電子電器配件鋁鈍化哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="通用電子電器配件鋁鈍化哪家好,鋁合金皮膜代加工" src="https://tyunfile.71360.com/UploadFile/szztjs/637447649953989599/9862682.png"></div><p style="text-indent:25px">鈍化的意義及機(jī)理：一般來說，易離子化的金屬容易氧化，即容易腐蝕，而事實(shí)上并非完全如此，有些金屬如鋁、鎂、鉻等雖然易離子化，但由于它們?cè)诖髿饣蛩腥菀咨梢粚痈g產(chǎn)物的薄膜，從而卻提高了耐蝕性。通過化學(xué)或電化學(xué)方法使金屬表面狀態(tài)發(fā)生變化，使其溶解速度急劇下降，使耐蝕性提高，此種工藝過程稱為鈍化。鈍化往往伴隨陽極電位突然升高，從而使陽極反應(yīng)難以進(jìn)行，使金屬腐蝕速度減慢或停止。由于鈍化能明顯提高金屬的耐蝕性，故在機(jī)械、電子、儀器、日用品、**器械等領(lǐng)域普遍應(yīng)用。通用電子電器配件鋁鈍化哪家好鈍化后的后一道水洗須使用純水，這樣有利于鹽霧測(cè)試時(shí)間的提高。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="通用電子電器配件鋁鈍化哪家好,鋁合金皮膜代加工" src="https://tyunfile.71360.com/UploadFile/szztjs/637447650662827507/685244.png"></div><p style="text-indent:25px">鋁合金鈍化，這道活化工序究竟有什么作用？活化作為鈍化中一道重要工序，一般采用稀硝酸，或稀硝酸加適量的氟化氫銨，所發(fā)揮的作用如下：1，活化劑對(duì)鋁合金輕微的酸蝕，使鋁合金露出良好的金屬界面，有利于鋁合金鈍化層的形成；2，可以消除鋁合金表面殘留的外在物質(zhì)或成分中的一些雜質(zhì)，消除雜質(zhì)對(duì)成膜過程帶來的影響，有利于鋁合金鈍化液與金屬的接觸，改善鈍化的成膜質(zhì)量；3，促進(jìn)成膜結(jié)晶均勻快速地形成，阻止大晶體的成長(zhǎng)，使鈍化膜的細(xì)而致密，形成好的鈍化膜層；4，加快了鈍化成膜時(shí)間，縮短了鈍化化處理的時(shí)間。5，有利于鋁合金提高鈍化后的耐腐蝕性能提高。</p><p style="text-indent:25px">表面鈍化處理方法：鋁及鋁合金工件，無論是化學(xué)氧化法或陽極氧化法制取的氧化膜都是多孔的，易受污染，耐蝕性不高。例如，鋁及鋁合金陽極氧化膜是一種具有蜂窩狀結(jié)構(gòu)的多于L膜，其微孔數(shù)量達(dá)4～77×109個(gè)/cm2，比表面積非常高。因此，使得氧化膜的表面具有極高的化學(xué)活性，空氣中或者使用環(huán)境中的腐蝕介質(zhì)或污染物極易被吸附到膜孔內(nèi)，所以未經(jīng)封閉處理的鋁合金陽極氧化膜耐蝕性和抗污染能力均不高。即使氧化膜在染色后也應(yīng)進(jìn)行鈍化或封閉處理，以提高其耐蝕性?，F(xiàn)在很多的鋁合金壓鑄企業(yè)都將業(yè)務(wù)擴(kuò)展到了國際市場(chǎng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="通用電子電器配件鋁鈍化哪家好,鋁合金皮膜代加工" src="https://tyunfile.71360.com/UploadFile/szztjs/637447650185727912/8804963.png"></div><p style="text-indent:25px">鋁合金鈍化是鋁合金表面處理常用方法。主要是鋁合金直接反應(yīng)，生成鈍化膜，來提高耐蝕能力和結(jié)合力。在某些程度上來說，鋁合金的鈍化和陽極氧化類似，鈍化的成本相對(duì)較低，處理量大，但不如陽極氧化耐腐蝕性好，外觀也沒有其均勻，但鈍化處理應(yīng)用十分普遍。鋁合金鈍化，如何根據(jù)耐腐蝕時(shí)間選用鈍化參數(shù)？鈍化后工件耐腐蝕性，除了要有良好鈍化劑配方之外，在作業(yè)過程中，主要與使用濃度、浸泡時(shí)間、浸泡溫度及PH值有關(guān)。以常用的ht433三價(jià)鉻鈍化劑為例，其使用環(huán)境在室溫下就可以，pH值3-4左右，時(shí)間2-5min，濃度10%就好了。具體有什么要求，可以問詢你自己供應(yīng)廠家。除油脫脂清洗：目的主要是去除鋁合金表面沾附的油污和臟污等雜質(zhì)。通用電子電器配件鋁鈍化哪家好</p><p style="text-indent:25px">鋁合金的活化劑一般會(huì)采用稀硝酸，一般不建議采用諸如硫酸、鹽酸、磷酸等氧化性地。通用電子電器配件鋁鈍化哪家好</p><p style="text-indent:25px">為了使鋁合金獲得更好的耐候性能，更長(zhǎng)的使用壽命，獲得不同色彩、光澤的外觀，使表面獲得特殊的性能如：隔音、絕熱、防火、防滑、防腐蝕、防靜電等。在鋁合金工件的生產(chǎn)加工過程的后階段，會(huì)對(duì)鋁合金表面進(jìn)行涂裝加工。而在對(duì)鋁合金工件在進(jìn)行靜電粉末涂裝、氟碳漆噴涂、隔熱絕緣涂料噴涂等涂裝加工前，需要對(duì)鋁合金工件表面進(jìn)行前處理。其目的在于，通過前處理提高涂層與底層基體表面的附著性能，并可提高涂料層的耐鹽霧、耐濕熱、耐腐蝕、耐浸水性能、阻止涂層的膜下腐蝕。通用電子電器配件鋁鈍化哪家好</p><p style="text-indent:25px">蘇州展圖金屬科技有限公司位于玉山鎮(zhèn)昆山國際模具城模具制造區(qū)17號(hào)樓13室。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下化學(xué)鍍鎳加工，鍍鎳磷合金，無電解鍍鎳，鎂合金化學(xué)鍍鎳深受客戶的喜愛。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競(jìng)爭(zhēng)力，努力學(xué)習(xí)行業(yè)知識(shí)，遵守行業(yè)規(guī)范，植根于化工行業(yè)的發(fā)展。在社會(huì)各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅(jiān)實(shí)有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3200168.html</p></div></div></div></div></div><div id="wea8cyu" class="page-right twoColRt"><div id="cq8j3lm" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="83l3sj3" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div 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