吉林表面達克羅處理誠信服務(wù) 常州捷邁特表面工程技術(shù)供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="涂覆過鋅鉻膜（達克羅）涂層的工件，從理論上講其耐蝕性要比電鍍鋅好，但在實際應(yīng)用中我們發(fā)現(xiàn)，部分標準件在使用不久發(fā)現(xiàn)出現(xiàn)點蝕，仔細分析了工件的制作過程，沒發(fā)現(xiàn)明顯的不足之處，經(jīng)過對大量出現(xiàn)問題的工件的統(tǒng)計分析，發(fā)現(xiàn)出現(xiàn)銹點的位置絕大部分在工件"><meta name="keywords" content="吉林表面達克羅處理,達克羅"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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id="8zbqmw8" class="proBig"><div id="guwl3wb" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/13915042526/637333457569833984/788425.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wgda228" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/13915042526/637333457569833984/788425.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3yfcg89" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>吉林表面達克羅處理,達克羅</p><p><span>***更新：</span>2020-11-27 08:16:37</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ix8r38x" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">常州捷邁特表面工程技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>張建平</p><p><span>郵箱: </span>2228205437@qq.com</p><p><span>電話: </span>13806111697</p><p><span>傳真: </span>0519_89886107</p><p><span>網(wǎng)址: </span>http://www.jmtdacromet.com</p><p><span>手機: </span>0519-89886107</p><p><span>地址: </span>昆侖路35號</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="zyvcj49" class="page-proshow02"><p class="title">詳細說明</p><div id="8rda8tk" class="box"><p><p style="text-indent:25px">涂覆過鋅鉻膜（達克羅）涂層的工件，從理論上講其耐蝕性要比電鍍鋅好，但在實際應(yīng)用中我們發(fā)現(xiàn)，部分標準件在使用不久發(fā)現(xiàn)出現(xiàn)點蝕，仔細分析了工件的制作過程，沒發(fā)現(xiàn)明顯的不足之處，經(jīng)過對大量出現(xiàn)問題的工件的統(tǒng)計分析，發(fā)現(xiàn)出現(xiàn)銹點的位置絕大部分在工件的尖角處，但并不是所有的尖角處均會出現(xiàn)銹點。經(jīng)對比，結(jié)論是工件在運輸過程中，由于振動和摩擦，尖角處的涂層比較容易被破壞，吉林表面達克羅處理，吉林表面達克羅處理，這也解釋了為什么未經(jīng)運輸?shù)墓ぜ谧鼷}霧試驗時，其尖角處的耐蝕性仍是很好。達克羅技術(shù)的基體材料范圍包括鋼鐵制品及有色金屬如鋁、鎂及其合金，銅，吉林表面達克羅處理、鎳、鋅等及其合金。吉林表面達克羅處理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林表面達克羅處理,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333457569833984/788425.png"></div><p style="text-indent:25px">達克羅技術(shù)是一種新型的表面處理技術(shù)，達克羅技術(shù)通過將工件直接浸入含鋅粉、鋁粉和鉻酐為主要原料的處理液中，或刷涂、噴涂使處理液粘附于工件表面，然后燒結(jié)形成含鋅、鋁、鉻的無機轉(zhuǎn)化膜，從而對工件表面進行防護。與傳統(tǒng)的電鍍工藝相比，達克羅涂層具有很強的耐蝕性能和穩(wěn)定性，而且在加工過程中對環(huán)境不產(chǎn)生污染。由于汽車零配件對于穩(wěn)定性、防熱、防水防潮及防蝕性能等都有較高的要求，對于達克羅涂料的引用提出了新的要求。四川達克羅處理生產(chǎn)廠達克羅涂料是銀灰色粘性液體。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林表面達克羅處理,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333457602304687/3572505.png"></div><p style="text-indent:25px">單獨檢測經(jīng)達克羅處理的墊圈抗腐蝕性能良好，經(jīng)過72h鹽霧試驗未發(fā)生任何銹蝕；與不銹鋼螺栓配合使用時，它的抗腐蝕性能明顯下降，經(jīng)過24h鹽霧試驗就開始發(fā)生銹蝕。達克羅涂層中Zn的電位為-0.762,而不銹鋼的電位為正，兩者之間存在著較大電位差，在水介質(zhì)中會發(fā)生電偶腐蝕。2種金屬構(gòu)成宏電池，產(chǎn)生電偶電流，使電位較低的達克羅涂層溶解加速（Zn=Zn2++2e)。當(dāng)涂層溶解到一定程度后，鎖緊墊圈的基材就暴露在潮濕空氣中，達克羅涂層就失去了它的防腐蝕功能，從而造成了彈簧鋼（鎖緊墊圈）的生銹。</p><p style="text-indent:25px">達克羅的涂層經(jīng)過高溫烘烤后，在工件的表面形成了由鋅、鋁片及復(fù)合鹽組成的涂層，它與鋼鐵基體有著良好的結(jié)合力，所以它的附著性相當(dāng)?shù)暮谩Ｍ瑫r，這樣形成的涂層表面，有利于各種涂料的再涂裝。達克羅使用技巧介紹：1.達克羅遇光照會迅速老化，所以達克羅的涂覆過程應(yīng)該在室內(nèi)進行。2.達克羅烘烤溫度過低、過高都會使達克羅喪失防腐能力，達克羅應(yīng)該在合適的溫度范圍內(nèi)烘烤。3.達克羅的使用周期很短，所以應(yīng)該盡快用完。達克羅的耐磨性能較差，所以應(yīng)頂涂達克羅，然后再涂以耐磨性的其他涂料。這項技術(shù)特別適用于管類及型腔復(fù)雜的汽車零件的防腐，有些組裝件在裝配好以后也適宜進行達克羅處理。達克羅技術(shù)的防腐機理：鋅對基體的受控的電化學(xué)保護作用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林表面達克羅處理,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333457687958984/8664291.png"></div><p style="text-indent:25px">鋅鉻膜（達克羅）涂層本身的強度并不高，硬度只有1H，為保持涂層的完整性，一則可以在改變涂層的配方，增加塑性，這點對于一般的用戶是無法做到的，對于鋅鉻膜（達克羅）涂料供應(yīng)商來講，他輕易也不愿更改配方。另一方法是在鋅鉻膜（達克羅）涂層之上再加上一層保護涂層，用以維持涂層在運輸過程中的完整性?？刹捎玫耐繉硬簧?，經(jīng)過篩選，我們使用了水性防腐封閉劑，其優(yōu)點是價格低廉，使用后增加成本不多。水性防腐封閉劑的母液，可按一比四的比例配制成工作液，每公斤涂液可涂覆十平方米左右的面積，并能提高涂層整體防腐性能。另一種可選用的鋅鉻膜（達克羅）涂層增強涂料是聚四氟乙烯，在工作涂覆了鋅鉻膜（達克羅）固化后再上一層聚四氟乙烯涂料，然后進爐在二百五十度下固化，其成本要比水性防腐封閉劑高，但涂覆了聚四氟乙烯的工件，其尖角處的防腐能力得到了很好的保證，圓滿的解決了本問題。與傳統(tǒng)的電鍍工藝相比，達克羅是一種“綠色電鍍”。北京達克羅表面處理</p><p style="text-indent:25px">達克羅涂層技術(shù)在日本稱Dacromet，在美國和歐洲則稱為鋅鉻涂層技術(shù)。吉林表面達克羅處理</p><p style="text-indent:25px">達克羅預(yù)烘：達克羅濕膜的工件必須盡快在120±20℃的溫度下，預(yù)烘10-15分鐘(根據(jù)工件吸熱量定)，使涂液水份蒸發(fā)，流平均勻。燒結(jié)：預(yù)烘后的工件必須在300℃左右的高溫下燒結(jié)，燒結(jié)時間20-40分鐘(根據(jù)工件的吸熱量定)，也可適當(dāng)提高溫度來縮短燒結(jié)時間。冷卻：工件燒結(jié)后，必須經(jīng)過冷卻系統(tǒng)充分冷卻后進行后繼處理或成品檢驗。達克羅技術(shù)與傳統(tǒng)的電鍍鋅、熱浸鋅技術(shù)相比有如下優(yōu)點：超常的耐蝕性。鋅的受控電化學(xué)保護作用，鋅、鋁片的屏蔽效應(yīng)以及鉻酸鹽的自我修復(fù)作用使得達克羅涂層具有很高的耐蝕性。吉林表面達克羅處理</p></p><br /><p>文章來源地址: 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