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id="0bdvsbv" class="twoCol"><div id="n9ce7xu" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-huagong_hxsj/">化學試劑</a>?<a href="http://www.cdcfah.com/cp/third-hxsj_qthxsj/">其他化學試劑</a>?江蘇鎂合金化學鍍鎳誠信為本上海昊琳化工供應(yīng)</p><div id="33oqxo3" class="leftbox clearfix"><h1>江蘇鎂合金化學鍍鎳誠信為本上海昊琳化工供應(yīng)</h1><div id="kbcp2gd" class="proBig"><div id="7ab8ske" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333783185078125/5272882.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="tvmoaho" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333783185078125/5272882.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="rgnp2n3" 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>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>江蘇鎂合金化學鍍鎳,化學鍍鎳</p><p><span>***更新：</span>2021-01-20 09:15:00</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="utasuli" 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: </span>021-59220920</p><p><span>地址: </span>白鶴鎮(zhèn)白石公路1360路28號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="hw27jv8" class="page-proshow02"><p class="title">詳細說明</p><div id="k8phzgi" class="box"><p><p style="text-indent:25px">化學鍍鎳廢液中，若不存在絡(luò)合劑或絡(luò)合劑的量較少時，可直接采用氫氧化鈉（濃度為6mol/L）調(diào)節(jié)pH值，根據(jù)廢液中鎳離子的濃度，加入適量的NaOH，使鎳離子沉淀為Ni(OH)2除去。對于有絡(luò)和劑廢液的除鎳，首先利用CaO調(diào)節(jié)廢液的pH值在8左右，江蘇鎂合金化學鍍鎳，除去大部分的有機酸絡(luò)合劑，然后在廢液中加入CaO或NaOH，調(diào)至廢液的pH值為11～12，使廢液中的大部分鎳離子和其他重金屬離子發(fā)生沉淀反應(yīng)，再加入適量的高分子絮凝劑，加速不溶物的沉降，在沉降過程中，加入適宜和適量的氧化劑（高錳酸鉀、雙氧水或氯氣等），江蘇鎂合金化學鍍鎳，以除去廢液中的次、亞磷酸鹽，有利于鎳離子的沉淀并降低廢水的化學耗氧量?；瘜W鍍鎳廢液中，江蘇鎂合金化學鍍鎳，若不存在絡(luò)合劑或絡(luò)合劑的量較少時，可直接采用氫氧化鈉調(diào)節(jié)pH值。江蘇鎂合金化學鍍鎳</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鎂合金化學鍍鎳,化學鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783185078125/5272882.png"></div><p style="text-indent:25px">化學鍍鎳技術(shù)是采用金屬鹽和還原劑，在材料表面上發(fā)生自催化反應(yīng)獲得鍍層的方法。到目前為止，化學鍍鎳是國外發(fā)展較快的表面處理工藝之一，且應(yīng)用范圍也非常廣?；瘜W鍍鎳之所以得到迅速發(fā)展，是由于其優(yōu)越的工藝特點所決定。化學鍍鎳層的工藝特點：1、不需要一般電鍍所需的直流電機或控制設(shè)備，熱處理溫度低，只要在400℃以下經(jīng)不同保溫時間后，可得到不同的耐蝕性和耐磨性，因此，它不存在熱處理變形的問題，特別適用于加工一些形狀復雜，表面要求耐磨和耐蝕的零部件等。2、化學沉積層的厚度可控，其工藝簡單，操作方便，溫度低，成本比其它表面處理防護低，適用于在中、小型工廠或小批量生產(chǎn)。建德化學鍍鎳液成分錫、銅和銅合金制件要先用鋁片接觸其表面上1-3分鐘，以加速化學鍍鎳。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鎂合金化學鍍鎳,化學鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783068779297/3182023.png"></div><p style="text-indent:25px">化學鍍鎳不用外來電流，借氧化還原作用在金屬制件的表面上沉積一層鎳的方法。用于提高抗蝕性和耐磨性，增加光澤和美觀。適合于管狀或外形復雜的小零件的光亮鍍鎳，不必再經(jīng)拋光。一般將被鍍制件浸入以硫酸鎳、次磷酸二氫鈉和硼酸所配成的混合溶液內(nèi)，在一定酸度和溫度下發(fā)生變化，溶液中的鎳離子被次磷酸二氫鈉還原為原子而沉積于制件表面上，形成細致光亮的鎳鍍層。鋼鐵制件可直接鍍鎳。錫、銅和銅合金制件要先用鋁片接觸于其表面上1-3分鐘，以加速化學鍍鎳。</p><p style="text-indent:25px">化學鍍鎳的工業(yè)應(yīng)用及工藝設(shè)計具有多樣性和**性的特點。傳統(tǒng)上，化學鍍是作為一種表面處理方法應(yīng)歸屬于電鍍，是電鍍的一個鍍種。但化學鍍不同于電鍍，主要是因為化學鍍不需要外加電源，而且操作方法與不同于電鍍，其特點如下：鍍層厚度均勻，化學鍍液的分散程度很高?；瘜W鍍本身是一個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復制，達到仿形的程度，不會像電鍍一樣，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。湖州鐵化學鍍鎳工藝化學鍍鎳被氧化成亞磷酸根;活性氫化物與溶液中的鎳離子進行還原反應(yīng)而沉積鎳，其本身氧化成氫氣?；瘜W鍍鎳的操作方法與不同于電鍍。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鎂合金化學鍍鎳,化學鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783243505859/8660814.png"></div><p style="text-indent:25px">化學鍍鎳的機理特點：化學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?；瘜W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鍍鎳工藝，其反應(yīng)機理，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的氫化物離子（氫的負離子H一），鎳離子被氫的負離子所還原。在酸性鍍液中，H2PO2-在催化表面上與水反應(yīng)，在堿性鍍液中，則為鎳離子被氫負離子所還原，即氫負離子H一同時可與H20或H+反應(yīng)放出氫氣：同時有磷還原析出?；瘜W鍍鎳是用于提高金屬制件的表面的抗蝕性和耐磨性，增加光澤和美觀。江蘇鎂合金化學鍍鎳</p><p style="text-indent:25px">化學鍍鎳的技術(shù)工藝處理后的金屬表面抗腐蝕性特別優(yōu)良。江蘇鎂合金化學鍍鎳</p><p style="text-indent:25px">化學鍍鎳的廢液處理：次磷亞磷。鍍鎳廢液中含有大量的次磷酸鹽和其被氧化的產(chǎn)物亞磷酸鹽，由于次磷酸鈣的溶解度較大，采用CaO沉淀法不能有效的除去次磷酸鹽，但在除去鎳離子時加入的CaO會使廢液的pH值增加，此時若提高廢液的溫度，溶液中的次磷酸根可將鎳離子及其他重金屬離子還原，次磷酸根被氧化成亞磷酸根。若廢液中含有較多的次磷酸根，可添加適當?shù)难趸瘎ㄈ绺咤i酸鉀，雙氧水等）除去。當廢液的pH值在7左右時，亞磷酸鈣的溶解度將急劇下降，試驗表明，在pH值為5．5～7時，鍍液中亞磷酸鹽的除去率在95%以上。江蘇鎂合金化學鍍鎳</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2930946.html</p></div></div></div></div></div><div id="ejyqxeg" class="page-right twoColRt"><div id="8e7fxz2" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gfhel8f" 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配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="7lnpmov" 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