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href="http://www.cdcfah.com/cp/third-hxsj_qthxsj/">其他化學(xué)試劑</a>?東陽彩色化學(xué)鍍鎳誠信互利上海昊琳化工供應(yīng)</p><div id="eolifm3" class="leftbox clearfix"><h1>東陽彩色化學(xué)鍍鎳誠信互利上海昊琳化工供應(yīng)</h1><div id="8eh32mc" class="proBig"><div id="qpm2w37" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333782859960937/1102100.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="tnprtfc" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333782859960937/1102100.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8vxzliz" 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>東陽彩色化學(xué)鍍鎳,化學(xué)鍍鎳</p><p><span>***更新：</span>2021-01-19 05:13:49</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="2li29o2" 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</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="cg2tegs" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="2v2sugs" class="box"><p><p style="text-indent:25px">化學(xué)鍍鎳在堿性鍍液中，東陽彩色化學(xué)鍍鎳，則為鎳離子被氫負(fù)離子所還原，即氫負(fù)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。迄今為止，化學(xué)鍍鎳的發(fā)展已有50多年的歷史。經(jīng)過半個多世紀(jì)的研究開發(fā)，化學(xué)鍍鎳已進(jìn)入發(fā)展成熟期，其現(xiàn)狀可概括為：技術(shù)成熟、性能穩(wěn)定、功能多樣、用途普遍。用化學(xué)鍍鎳沉積的鍍層，有一些不同于電沉積層的特性。以次磷酸鈉為還原劑時，由于有磷析出，發(fā)生磷與鎳的共沉積，所以化學(xué)鍍鎳層是磷呈彌散態(tài)的鎳磷合金鍍層，鍍層中磷的質(zhì)量分?jǐn)?shù)為1%～l5%，控制磷含量得到的鎳磷鍍層致密、無孔，耐蝕性遠(yuǎn)優(yōu)于電鍍鎳。以硼氫化物或氨基硼烷為還原劑時，化學(xué)鍍鎳層是鎳硼合金鍍層，硼的含量為1%～7%。只有以肼作還原劑得到的鍍層才是純鎳層，含鎳量可達(dá)到99．5%以上，東陽彩色化學(xué)鍍鎳?；瘜W(xué)鍍鎳的歷史與電鍍相比，東陽彩色化學(xué)鍍鎳，比較短暫?，F(xiàn)在化學(xué)鍍鎳的技術(shù)性能很穩(wěn)定。東陽彩色化學(xué)鍍鎳</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="東陽彩色化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333782859960937/1102100.png"></div><p style="text-indent:25px">化學(xué)鍍鎳時使用的接觸鍍：將欲鍍的金屬與另一種金屬或另一塊相同金屬接觸，并沉浸在沉積金屬的鹽溶液中的沉積法。；當(dāng)欲鍍的導(dǎo)電基底表面與比溶液中待沉積的金屬更為活潑的金屬接觸時，便構(gòu)成接觸沉積。在基底和接觸金屬之間形成了原電池對，其中接觸金屬是陽極，發(fā)生溶解，而欲鍍基底起陰極的作用，金屬便沉積到它的上面。此法與電沉積反應(yīng)相同，所不同的是電流來自化學(xué)反應(yīng)，而不是由外電源提供。此法幾乎沒有實用意義，但是，它對在無催化活性基底上引發(fā)化學(xué)沉積，起到“反應(yīng)起動劑”的作用上，具有重要意義。東陽彩色化學(xué)鍍鎳化學(xué)鍍鎳由于次磷酸鈣的溶解度較大，采用沉淀法不能有效的除去次磷酸鹽。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="東陽彩色化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783093632812/9233108.png"></div><p style="text-indent:25px">用次磷酸鹽作還原劑的化學(xué)鍍鎳溶液中鍍得的鍍層含有4%～15%的磷，是一種鎳磷合金，以硼氫化物或胺基硼烷作還原劑得到的鍍層才是純鎳層，含鎳量可達(dá)99.5%以上。剛沉積出來的化學(xué)鍍鎳層是無定型的，呈非晶型薄片狀結(jié)構(gòu)物質(zhì)。鍍層中磷含量主要決定于溶液的pH值，隨著pH值降低，磷含量增大。常規(guī)的酸性化學(xué)鍍鎳溶液中沉積出的鍍層含磷量為7%～12%，而堿性溶液中沉積的鎳層含磷量為4%～7%。此外，溶液的組成及各組分的含量和它們的相對比率，以及溶液的工作溫度等都對含磷量有一定的影響。</p><p style="text-indent:25px">化學(xué)鍍鎳的廢液處理：鎳離子?；瘜W(xué)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，除去大部分的有機(jī)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，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(xué)耗氧量（COD）。用化學(xué)鍍鎳沉積的鍍層，有一些不同于電沉積層的特性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="東陽彩色化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783185078125/5272882.png"></div><p style="text-indent:25px">化學(xué)鍍鎳層的性能有如下諸多優(yōu)點：⑴利用次磷酸鈉作為還原劑的化學(xué)鍍鎳過程得到的是Ni-P合金，控制鍍層中的磷含量可以得到Ni-P非晶態(tài)結(jié)構(gòu)鍍層。鍍層致密、孔隙率低、耐腐蝕性能均優(yōu)于電鍍鎳。⑵化學(xué)鍍鎳層的鍍態(tài)硬度為450~600HV，經(jīng)過合理的熱處理后，可以達(dá)到1000-1100HV，在某些情況下，甚至可以代替硬鉻使用。⑶根據(jù)鍍層中的含磷量，可以控制鍍層為磁性或非磁性。⑷鍍層的磨擦系數(shù)低，可以達(dá)到無油潤滑的狀態(tài)，潤滑性與抗金屬磨損性方面也優(yōu)于電鍍。⑸低磷鍍層具有良好的可焊性?；瘜W(xué)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。東陽彩色化學(xué)鍍鎳</p><p style="text-indent:25px">化學(xué)鍍鎳以它優(yōu)良的鍍層性能，如硬度高，耐磨性和耐蝕性都很優(yōu)異，越來越為生產(chǎn)廠家所接受。東陽彩色化學(xué)鍍鎳</p><p style="text-indent:25px">化學(xué)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(dāng)?shù)难趸瘎ㄈ绺咤i酸鉀，雙氧水等）除去。當(dāng)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。對于未除去的亞磷酸鹽可以采用鎢酸鈉作為催化劑，利用雙氧水將亞磷酸鹽氧化為磷酸鹽的方法；或直接利用高錳酸鉀作為氧化劑將多余的次磷酸鹽及亞磷酸鹽氧化為磷酸鹽。在含有磷酸鹽的廢液中加入CaO，調(diào)節(jié)廢液的pH值在9．5以上，磷酸鈣的溶解度較小，生成的沉淀物很容易過濾除去。東陽彩色化學(xué)鍍鎳</p></p><br /><p>文章來源地址: 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