材料達克羅供應(yīng)商誠信互利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="表面達克羅處理的鎖緊墊圈在使用過程中出現(xiàn)生銹問題的原因是：在緊固件選型過程中沒有考慮到碳鋼達克羅涂層和不銹鋼的電位差較大，材料達克羅供應(yīng)商，再加上使用環(huán)境惡劣，有水介質(zhì)存在，造成腐蝕加速，材料達克羅供應(yīng)商，材料達克羅供應(yīng)商。考慮到鎖緊墊圈的"><meta name="keywords" content="材料達克羅供應(yīng)商,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 http-equiv="Cache-Control" 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clearfix"><h1>材料達克羅供應(yīng)商誠信互利常州捷邁特表面工程技術(shù)供應(yīng)</h1><div id="inf2ikm" class="proBig"><div id="m7gqifm" 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="byfu2uq" 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="3urotg2" 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>材料達克羅供應(yīng)商,達克羅</p><p><span>***更新：</span>2020-11-05 02:17:07</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="77xjqix" 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="rm2yvs2" class="page-proshow02"><p class="title">詳細說明</p><div id="zjbdasr" class="box"><p><p style="text-indent:25px">表面達克羅處理的鎖緊墊圈在使用過程中出現(xiàn)生銹問題的原因是：在緊固件選型過程中沒有考慮到碳鋼達克羅涂層和不銹鋼的電位差較大，材料達克羅供應(yīng)商，再加上使用環(huán)境惡劣，有水介質(zhì)存在，造成腐蝕加速，材料達克羅供應(yīng)商，材料達克羅供應(yīng)商?？紤]到鎖緊墊圈的使用環(huán)境較惡劣（室外），根據(jù)電偶腐蝕原理，同一機構(gòu)中應(yīng)盡可能用同一種金屬，或者電位盡可能接近的兩種金屬，并用絕緣物使之隔開，避免產(chǎn)生電偶腐蝕。因此，確定采用不銹鋼A4的鎖緊墊圈替代彈簧鋼墊圈。達克羅是目前表面處理使用比較多的，另外氧化、磷化也挺多。達克羅在溫度35℃±2℃、濕度95%條件下，經(jīng)過10個周期240小時循環(huán)試驗，達克羅加工涂層表面無變化。材料達克羅供應(yīng)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="材料達克羅供應(yīng)商,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333457569833984/788425.png"></div><p style="text-indent:25px">達克羅的鉻固化時，涂膜中的水份、有機類（纖維素）物質(zhì)等揮發(fā)份在揮發(fā)的同時，依靠鋅鉻膜（達克羅）母液中的高價鉻鹽的氧化性，使電極電位負值較大的單質(zhì)鋅片、鋁片漿與鐵基體反應(yīng)，形成Fe、Zn、Al的鉻鹽化合物無機涂層。由于膜層是與基體直接后應(yīng)獲得的，所以該防腐層極為致密，（用鍍鋅或浸鋅方法獲得的防腐層無法與之相比）該涂層在腐蝕環(huán)境下，會形成無數(shù)個原電池，即先腐蝕掉電位較負的Al、Zn鹽類，直到它們被消耗后才有可能腐蝕至基體本身。鋅鉻膜（達克羅）涂層是由重疊在一起的**鋅片、鉻酸聚合物單元組成。鋅鉻膜（達克羅）涂層中的鉻酸聚合物層不含結(jié)晶水，因此在高溫狀態(tài)下的抗腐蝕能力也表現(xiàn)出很好的品質(zhì)。材料達克羅供應(yīng)商達克羅的不同的表面處理工藝會產(chǎn)生不同的摩擦系數(shù)，摩擦系數(shù)較高時，螺栓的防松性能相對較好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="材料達克羅供應(yīng)商,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333457642988281/7149056.png"></div><p style="text-indent:25px">達克羅在載重汽車上各種**度底盤中小支架、連接件、外露件及緊固件的防腐，如各種異型鋼支架、螺栓（含騎馬螺栓、車輪螺栓等）、螺母等。這個已明確建議汽車上≥10.9級的緊固件要使用達克羅涂層防腐，因為達克羅涂覆不僅有高的耐腐蝕性，而且能夠保證無氫脆。**度鋼在酸洗和電鍍等過程中有產(chǎn)生氫脆的危險性，雖然可以通過熱處理去氫，但是很難徹底去除。達克羅涂覆過程不需要酸洗和活化，也沒有導(dǎo)致析氫的電化學(xué)反應(yīng)發(fā)生，避免了氫脆現(xiàn)象的出現(xiàn)。</p><p style="text-indent:25px">達克羅工藝流程是有機溶劑除油，機械拋光，噴涂，烘烤，二次噴涂，烘烤，干燥。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。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。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。達克羅這個名字是英文DACROMET的音譯，也被人們稱為達克銹或者是達克龍，它是一種將金屬鋁，鋅以及鉻酸作為主要涂覆原料的新型金屬表面防腐蝕涂料。達克羅的誕生是為了給汽車提供更好的防腐蝕性能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="材料達克羅供應(yīng)商,達克羅" src="https://tyunfile.71360.com/UploadFile/13915042526/637333458032021484/75361.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。可采用的涂層不少，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。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。材料達克羅供應(yīng)商</p><p style="text-indent:25px">達克羅加工涂層的防腐蝕是建立在鉻酸的鈍化作用和鋅的受控**保護作用之上的。材料達克羅供應(yīng)商</p><p style="text-indent:25px">鎖緊墊圈材質(zhì)為彈簧鋼，表面進行達克羅處理，配合A4-80的不銹鋼螺栓、螺母使用。但是使用一段時間后發(fā)現(xiàn),用在車輛外部的鎖緊墊圈，如車頂空調(diào)減震安裝螺栓處的鎖緊墊圈出現(xiàn)銹蝕現(xiàn)象,而在車內(nèi)及底架起緊固作用的墊圈暫未發(fā)現(xiàn)銹蝕情況。達克羅涂層不符要求，達克羅表面涂層存在起泡、開裂、細孔和漏涂等缺陷，不能起到有效的經(jīng)分析，達克羅表面處理過的鎖緊墊圈出現(xiàn)銹防腐作用，造成氧化腐蝕。達克羅處理的鎖緊墊圈與不銹鋼螺栓配合使用，由于2種金屬材料的腐蝕電位不同，造成電位較低的彈簧鋼墊圈更加容易溶解銹蝕。材料達克羅供應(yīng)商</p></p><br /><p>文章來源地址: 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