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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bkh33h9" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haolin123/637333783149238281/5920410.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="gk38zv8" 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>昆山鋼管化學(xué)鍍鎳,化學(xué)鍍鎳</p><p><span>***更新：</span>2021-01-31 06:15:35</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="imoacta" 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="sho7jlc" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="yme8lht" class="box"><p><p style="text-indent:25px">化學(xué)鍍鎳的物理特征：（1）鍍層厚度均勻，化學(xué)鍍液的分散程度接近100%。化學(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，昆山鋼管化學(xué)鍍鎳。（2）化學(xué)鍍不僅可以在金屬表面施鍍，通過特殊的活化、敏化處理，也可以在非金屬表面上進(jìn)行。（3）化學(xué)鍍?cè)O(shè)備簡(jiǎn)單，不需要電源及陽極，只要在溫度，昆山鋼管化學(xué)鍍鎳，昆山鋼管化學(xué)鍍鎳、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?；瘜W(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。昆山鋼管化學(xué)鍍鎳</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆山鋼管化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783149238281/5920410.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(duì)比率，以及溶液的工作溫度等都對(duì)含磷量有一定的影響。宜興塑料化學(xué)鍍鎳化學(xué)鍍鎳技術(shù)處理后的合金層與金屬基件結(jié)合強(qiáng)度增大。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆山鋼管化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333783296416016/1330118.png"></div><p style="text-indent:25px">化學(xué)鍍鎳是不用外來電流，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(fù)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、乙酸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(xì)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(xué)鍍鎳。</p><p style="text-indent:25px">化學(xué)鍍鎳在電子和計(jì)算機(jī)工業(yè)中應(yīng)用得非常廣，幾乎涉及到每一種化學(xué)鍍鎳技術(shù)和工藝。許多新的化學(xué)鍍鎳工藝和材料正是根據(jù)電子和計(jì)算機(jī)工業(yè)發(fā)展的需要而研制開發(fā)出來的。在技術(shù)性能方面，除要求耐蝕耐磨之外，還具有可焊接、防擴(kuò)散性、電性能和磁性能等要求。電子設(shè)備的塑料外殼上鍍銅，然后化學(xué)鍍鎳，這樣的雙金屬結(jié)構(gòu)覆層，被公認(rèn)為是非常有效的屏蔽方式之一?；瘜W(xué)鍍鎳是計(jì)算機(jī)薄膜硬磁盤制造中的關(guān)鍵步驟之一。鍍層必須均勻、光滑，表面上的任何缺陷和突起不得超過0.025um。因?yàn)榧夹g(shù)要求高所以必須使用高質(zhì)量高清潔度的**化學(xué)鍍液、全自動(dòng)的施鍍控制設(shè)備和高清潔度的車間環(huán)境。計(jì)算機(jī)薄膜硬磁盤化學(xué)鍍鎳是高技術(shù)化學(xué)鍍鎳的典型表率，占有相當(dāng)重要的市場(chǎng)份額。化學(xué)鍍鎳廢液中加入少量的銅離子作為催化劑時(shí)，廢液可以得到深度處理。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆山鋼管化學(xué)鍍鎳,化學(xué)鍍鎳" src="https://tyunfile.71360.com/UploadFile/haolin123/637333782988798828/1953806.png"></div><p style="text-indent:25px">用化學(xué)鍍鎳沉積的鍍層，有一些不同于電沉積層的特性。①以次磷酸鈉為還原劑時(shí)，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(shí)，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。②化學(xué)穩(wěn)定性高、鍍層結(jié)合力好。在大氣中以及在其他介質(zhì)中，化學(xué)鍍鎳層的化學(xué)穩(wěn)定性高于電鍍鎳層的化學(xué)穩(wěn)定性。與通常的鋼鐵、銅等基體的結(jié)合良好，結(jié)合力不低于電鍍鎳層和基體的結(jié)合力?；瘜W(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。昆山鋼管化學(xué)鍍鎳</p><p style="text-indent:25px">化學(xué)鍍鎳是新近發(fā)展起來的一門新技術(shù)。昆山鋼管化學(xué)鍍鎳</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(shí)，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(duì)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）。昆山鋼管化學(xué)鍍鎳</p></p><br /><p>文章來源地址: 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