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class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333783068779297/3182023.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="13nfczg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333783068779297/3182023.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ixumoah" 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>上?；瘜W(xué)鍍鎳加工工廠,化學(xué)鍍鎳</p><p><span>***更新：</span>2021-02-01 09:15:38</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="6wse88t" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海昊琳化工有限公司</a></p><p><span>聯(lián)系人：</span>彭**</p><p><span>郵箱: </span>SHHL668@163.com</p><p><span>電話: </span>13917612469</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://haolin123.shop.88360.com</p><p><span>手機(jī): </span>021-59220920</p><p><span>地址: </span>白鶴鎮(zhèn)白石公路1360路28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="hrjqx2a" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="qfhov83" class="box"><p><p style="text-indent:25px">化學(xué)鍍鎳不*可以在金屬表面施鍍，通過特殊的活化、敏化處理，還能夠在非金屬表面上進(jìn)行?；瘜W(xué)鍍鎳設(shè)備簡單，不需要電源及陽極，只要在溫度、pH值工藝參數(shù)合理的條件下，把待鍍零件浸入在鍍液中即可。化學(xué)鍍鎳的結(jié)合力、防腐性能都優(yōu)于電鍍。某些化學(xué)鍍層還有特殊的物理化學(xué)性能?；瘜W(xué)鍍鎳硬度高，耐磨性好，化學(xué)鍍鎳層熱處理后硬度達(dá)Hv1100，工模具鍍鎳后一般壽命提高3倍以上?；瘜W(xué)鍍鎳耐腐蝕強(qiáng)，化學(xué)鍍鎳層在酸、堿，上?；瘜W(xué)鍍鎳加工工廠，上海化學(xué)鍍鎳加工工廠、鹽、氨和海水等介質(zhì)中都具有很好的耐腐蝕性，其耐腐蝕性勝于不銹鋼。化學(xué)鍍鎳是在不通電的情況下，上?；瘜W(xué)鍍鎳加工工廠，利用氧化還原反應(yīng)在具有催化表面的鍍件上，獲得金屬合金的方法。上海化學(xué)鍍鎳加工工廠</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?；瘜W(xué)鍍鎳加工工廠,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783068779297/3182023.png"></div><p style="text-indent:25px">化學(xué)鍍鎳又稱為無電解鍍，也可以稱為自催化電鍍。具體過程是指：在一定條件下，水溶液中的金屬離子被還原劑還原，并且沉淀到固態(tài)基體表面上的過程?；瘜W(xué)鍍鎳就是在不通電的情況下，利用氧化還原反應(yīng)在具有催化表面的鍍件上，獲得金屬合金的方法。它是新近發(fā)展起來的一門新技術(shù)。化學(xué)鍍鎳經(jīng)過多年的不斷探索與研究，近幾年已發(fā)展極成熟了，化學(xué)鍍鎳水幾乎適用于所有金屬表面鍍鎳。如：鋼鐵鍍鎳，不銹鋼鍍鎳，鋁鍍鎳，銅鍍鎳等等，它同樣適用于非金屬表面鍍鎳。比如：陶瓷鍍鎳，玻璃鍍鎳，金剛石鍍鎳，碳片鍍鎳，塑料鍍鎳，樹脂鍍鎳等等。使用范圍是非常普遍的。上海化學(xué)鍍鎳加工工廠化學(xué)鍍鎳的技術(shù)工藝處理后的金屬表面摩擦系數(shù)小。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海化學(xué)鍍鎳加工工廠,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783185078125/5272882.png"></div><p style="text-indent:25px">化學(xué)鍍鎳的工業(yè)應(yīng)用及工藝設(shè)計(jì)具有多樣性和**性的特點(diǎn)。傳統(tǒng)上，化學(xué)鍍是作為一種表面處理方法應(yīng)歸屬于電鍍，是電鍍的一個(gè)鍍種。但化學(xué)鍍不同于電鍍，主要是因?yàn)榛瘜W(xué)鍍不需要外加電源，而且操作方法與不同于電鍍，其特點(diǎn)如下：鍍層厚度均勻，化學(xué)鍍液的分散程度很高?；瘜W(xué)鍍本身是一個(gè)自催化的氧化還原過程，只要催化基體與溶液接觸到就可以施鍍，幾乎是基體形狀的一個(gè)復(fù)制，達(dá)到仿形的程度，不會(huì)像電鍍一樣，出現(xiàn)由于電力線分布不均勻而引起的鍍層厚度不均的現(xiàn)象。湖州鐵化學(xué)鍍鎳工藝化學(xué)鍍鎳被氧化成亞磷酸根;活性氫化物與溶液中的鎳離子進(jìn)行還原反應(yīng)而沉積鎳，其本身氧化成氫氣。</p><p style="text-indent:25px">化學(xué)鍍鎳的機(jī)理特點(diǎn)：化學(xué)鍍鎳是用還原劑把溶液中的鎳離子還原沉積在具有催化活性的表面上。化學(xué)鍍鎳可以選用多種還原劑，工業(yè)上應(yīng)用較普遍的是以次磷酸鈉為還原劑的化學(xué)鍍鎳工藝，其反應(yīng)機(jī)理，普遍被接受的是和“氫化物理論”。氫化物理論。氫化物理論認(rèn)為，次磷酸鈉分解不是放出原子態(tài)氫，而是放出還原能力更強(qiáng)的氫化物離子（氫的負(fù)離子H一），鎳離子被氫的負(fù)離子所還原。在酸性鍍液中，H2PO2-在催化表面上與水反應(yīng)，在堿性鍍液中，則為鎳離子被氫負(fù)離子所還原，即氫負(fù)離子H一同時(shí)可與H20或H+反應(yīng)放出氫氣：同時(shí)有磷還原析出。化學(xué)鍍鎳是在金屬制件的表面上沉積一層鎳的方法。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?；瘜W(xué)鍍鎳加工工廠,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783170947266/6080931.png"></div><p style="text-indent:25px">石油和天然氣是化學(xué)鍍鎳的重要市場(chǎng)之一，油田采油和輸油管道設(shè)備普遍地采用化學(xué)鍍鎳技術(shù)。典型的石油和天然氣工業(yè)腐蝕環(huán)境為井下鹽水、二氧化碳、硫化氫，溫度高達(dá)170～200℃，并伴有泥沙和其他磨粒沖蝕等等，腐蝕環(huán)境相當(dāng)惡劣。低碳鋼油氣管道在如此苛刻的條件下，*有2～3個(gè)月的壽命。經(jīng)過50～100um厚的高磷化學(xué)鍍鎳層保護(hù)之后，其腐蝕速率降低到與哈氏合金相當(dāng)?shù)某潭?。考慮到耐蝕合金價(jià)格昂貴，從性能價(jià)格比上講，碳鋼管道采用化學(xué)鍍鎳保護(hù)的技術(shù)經(jīng)濟(jì)性能較好?；瘜W(xué)鍍鎳可以在非金屬表面上進(jìn)行。上?；瘜W(xué)鍍鎳加工工廠</p><p style="text-indent:25px">化學(xué)鍍鎳在離子交換情況下，基底金屬本身就是還原劑。上?；瘜W(xué)鍍鎳加工工廠</p><p style="text-indent:25px">化學(xué)鍍鎳技術(shù)在微電子器件制造業(yè)中應(yīng)用的增長十分迅速。超大規(guī)模集成電路多層芯片的互連和導(dǎo)通孔的充填整平化工藝中，采用了選擇性的鎳磷合金化學(xué)鍍技術(shù)；其產(chǎn)品均通過了抗剪切強(qiáng)度、抗拉強(qiáng)度、高低溫循環(huán)和各項(xiàng)電性能的試驗(yàn)。實(shí)踐說明，化學(xué)鍍鎳技術(shù)的應(yīng)用提高了微電子器件制造工藝的技術(shù)經(jīng)濟(jì)性和產(chǎn)品的可靠性。鑄造用模型和芯盒通常為鑄鐵或鑄鋁件，在使用過程中遭受磨料磨損，報(bào)廢很快。采用化學(xué)鍍鎳鎳表面保護(hù)之后，鑄造模型和型芯盒的質(zhì)量上等級(jí)，使用壽命明顯提高?；瘜W(xué)鍍鎳在90℃的酸性溶液或接近常溫的中性溶液、堿性溶液中進(jìn)行作業(yè)。上?；瘜W(xué)鍍鎳加工工廠</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3110633.html</p></div></div></div></div></div><div id="koqi7jl" class="page-right twoColRt"><div id="87r2b7l" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="j3egduw" 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" 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