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src="https://tyunfile.71360.com/UploadFile/shhxdd/637339476822841797/7617865.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vr7dubs" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhxdd/637339476822841797/7617865.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="g74xzlx" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南京閥塊電鍍鋅鎳合金,電鍍鋅鎳合金</p><p><span>***更新：</span>2021-02-03 10:17:38</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="pgif7c3" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海弘夏電鍍有限公司銷售</a></p><p><span>聯(lián)系人：</span>施經(jīng)理</p><p><span>郵箱: </span>www.platessy@163.com</p><p><span>電話: </span>15221395693</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://shhxdd.shop.88360.com</p><p><span>手機(jī): </span>021-58088779</p><p><span>地址: </span>大團(tuán)鎮(zhèn)大泥公路139號(hào)</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="92rvt32" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="uyah3xw" class="box"><p><p style="text-indent:25px">什么是電鍍鋅？鍍就是利用電解原理在某些金屬表面上鍍上一薄層其它金屬或合金的過程，南京閥塊電鍍鋅鎳合金，是利用電解作用使金屬或其它材料制件的表面附著一層金屬膜的工藝從而起到防止金屬氧化（如銹蝕），提高耐磨性、導(dǎo)電性、反光性、抗腐蝕性（硫酸銅等）及增進(jìn)美觀等作用，南京閥塊電鍍鋅鎳合金。不少硬幣的外層亦為電鍍。電鍍時(shí)，鍍層金屬或其他不溶性材料做陽極，待鍍的工件做陰極，鍍層金屬的陽離子在待鍍工件表面被還原形成鍍層。為排除其它陽離子的干擾，且使鍍層均勻、牢固，需用含鍍層金屬陽離子的溶液做電鍍液，以保持鍍層金屬陽離子的濃度不變。電鍍的目的是在基材上鍍上金屬鍍層，改變基材表面性質(zhì)或尺寸。電鍍能增強(qiáng)金屬的抗腐蝕性(鍍層金屬多采用耐腐蝕的金屬)，南京閥塊電鍍鋅鎳合金、增加硬度、防止磨耗、提高導(dǎo)電性、光滑性、耐熱性和表面美觀。電鍍鋅鎳合金工業(yè)性應(yīng)用始于1905年,其中大部分是關(guān)于鋼板快速電鍍。南京閥塊電鍍鋅鎳合金</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京閥塊電鍍鋅鎳合金,電鍍鋅鎳合金" src="https://tyunfile.71360.com/UploadFile/shhxdd/637339476822841797/7617865.png"></div><p style="text-indent:25px">電鍍鋅鎳合金對(duì)防腐技術(shù)要求較高，電鍍鋅鎳合金層耐腐蝕性為純鋅鍍層五倍左右，鍍層的本身對(duì)鋼鐵基體表現(xiàn)為陽極性鍍層，可以提供有效的陰極保護(hù)作用，獲得較長時(shí)間的耐蝕性能，充分顯示涂層本身就具有非常低的腐蝕速率。電鍍鋅鎳合金可以加工性與電鍍純鋅層是相當(dāng)?shù)?，鍍層?jīng)過變形加工后，具有優(yōu)于純鋅鍍層的一些耐蝕性能。電鍍鋅鎳合金的低氫脆，脆化率、光亮鍍鎘要求在標(biāo)準(zhǔn)范圍內(nèi)，電鍍鋅鎳合金層的硬度要比純鋅高，所以具有十分良好的耐磨性能。南京閥塊電鍍鋅鎳合金通常鍍層厚度在5～15μm即可滿足耐蝕性要求。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京閥塊電鍍鋅鎳合金,電鍍鋅鎳合金" src="https://tyunfile.71360.com/UploadFile/shhxdd/637339477014921875/8154120.png"></div><p style="text-indent:25px">當(dāng)鋅鎳合金鍍層中含鎳量為8%~15%(較佳值13%)時(shí),其耐蝕性能優(yōu)良,約為同等厚度下鍍鋅層的3倍~5倍;而且含鎳量15%以下的鋅鎳合金鍍層還可以鈍化,鈍化后耐蝕性得到一定的增強(qiáng);鋅鎳合金鍍層基本無氫脆,可焊性和延展性也較好。所以,鋅鎳合金鍍層是一種適合緊固件的成熟、合理的防護(hù)層。通過相關(guān)工藝試驗(yàn),著重對(duì)鋅鎳合金鍍層性能進(jìn)行了分析研究。相比鋅鍍層而言,鋅鎳合金鍍層的耐蝕性能更加優(yōu)異。研究表明,當(dāng)鋅鎳合金鍍層發(fā)生腐蝕時(shí),鎳的存在導(dǎo)致其腐蝕產(chǎn)物為ZnCl2?4Zn(OH)2,該產(chǎn)物均勻致密地覆蓋在表面上,且不易導(dǎo)電,故對(duì)鍍層有保護(hù)作用;而且,鎳對(duì)陰極過程有阻抑的作用,這也有利于耐蝕性的提高。然而,鋅鍍層的腐蝕產(chǎn)物主要是疏松、無保護(hù)性的半導(dǎo)體ZnO。這些原因合理解釋了試驗(yàn)結(jié)果。</p><p style="text-indent:25px">電鍍鋅原理：在盛有鍍鋅液的鍍槽中，經(jīng)過清理和特殊預(yù)處理的待鍍件作為陰極，用鍍覆金屬制成陽極，兩極分別與直流電源的正極和負(fù)極聯(lián)接。鍍鋅液由含有鍍覆金屬的化合物、導(dǎo)電的鹽類、緩沖劑、pH調(diào)節(jié)劑和添加劑等的水溶液組成。通電后，鍍鋅液中的金屬離子，在電位差的作用下移動(dòng)到陰極上形成鍍層。陽極的金屬形成金屬離子進(jìn)入鍍鋅液，以保持被鍍覆的金屬離子的濃度。在有些情況下，如鍍鉻，是采用鉛、鉛銻合金制成的不溶性陽極，它只起傳遞電子、導(dǎo)通電流的作用。電解液中的鉻離子濃度，需依靠定期地向鍍液中加入鉻化合物來維持。鍍鋅時(shí)，陽極材料的質(zhì)量、鍍鋅液的成分、溫度、電流密度、通電時(shí)間、攪拌強(qiáng)度、析出的雜質(zhì)、電源波形等都會(huì)影響鍍層的質(zhì)量，需要適時(shí)進(jìn)行控制。電鍍鋅鎳合金有好的耐腐蝕性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京閥塊電鍍鋅鎳合金,電鍍鋅鎳合金" src="https://tyunfile.71360.com/UploadFile/shhxdd/637339477004326172/4417783.png"></div><p style="text-indent:25px">電鍍鋅鎳合金的鍍層光亮度差，凹處發(fā)暗可能原因及處理方法：金屬離子濃度太高。稀釋鍍液，并分析調(diào)整鍍液成分至標(biāo)準(zhǔn)值；減少陽極面積，并控制陰陽面積之比，防止鋅、鎳含量升高。導(dǎo)電不良。加強(qiáng)導(dǎo)電極桿、導(dǎo)電觸電、掛具掛鉤等的維護(hù)保養(yǎng)，定期擦拭、清理，保證接觸充分、導(dǎo)電良好；加強(qiáng)對(duì)整流機(jī)的維護(hù)保養(yǎng)，定期對(duì)儀器，儀表進(jìn)行校核。鍍層粗糙可能原因及處理方法：鋅含量過高。稀釋鍍液，并分析調(diào)整成分至標(biāo)準(zhǔn)值；減少陽極面積，并控制陰陽面積之比，防止鋅含量升高。PH值過高。用10％的鹽酸調(diào)整PH值至標(biāo)準(zhǔn)值，切忌用濃鹽酸或高濃度的氫氧化納溶液調(diào)整PH值。有機(jī)光亮劑過多。用電解處理或活性炭吸附處理，降低光亮劑的含量。電鍍鋅鎳合金層是一種優(yōu)良防護(hù)性鍍層，主要用作鋼鐵材料的耐蝕防護(hù)。揚(yáng)州鍍鎳合金生產(chǎn)廠家</p><p style="text-indent:25px">電鍍鋅所涉及的領(lǐng)域是越來越多。南京閥塊電鍍鋅鎳合金</p><p style="text-indent:25px">電鍍鋅要根據(jù)所需要電鍍的工件來選擇工藝。電鍍鋅要注意電鍍的工藝流程跟所有表面處理的工藝一樣,鍍鋅工藝流程也是可以分為前處理,電鍍,后處理,這三個(gè)步驟都要值得重視。前處理是為了獲得清潔干凈的金屬表面,使鋅能夠順利有效的沉積在基體金屬之上,鋅鍍層的厚度從零點(diǎn)幾個(gè)微米到幾十微米都有.無論要獲得怎樣的厚度,都需要鍍層和基體金屬的良好結(jié)合。前處理其實(shí)也不外乎用酸堿或者表面活性劑或者電解或者超聲波。一般都需要幾個(gè)工序結(jié)合起來才能將工件表面處理干凈.干凈的表面對(duì)于電鍍來說是很關(guān)鍵的。南京閥塊電鍍鋅鎳合金</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3142754.html</p></div></div></div></div></div><div id="etvhwdf" class="page-right twoColRt"><div id="dxe2rsu" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2iegiul" 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 id="wlifhe2" class="recomPic likePro"><a 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