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rel="nofollow">上海眾霖五金有限公司</a></p><p><span>聯(lián)系人：</span>李俊</p><p><span>郵箱: </span>lijun@zhong-lin.cn</p><p><span>電話: </span>15821195363</p><p><span>傳真: </span>020_</p><p><span>網(wǎng)址: </span>http://Shzhonglin.shop.88360.com</p><p><span>手機(jī): </span>020-15821195</p><p><span>地址: </span>上海市松江區(qū)民強(qiáng)路550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="h83sp27" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="ep7q7mj" class="box"><p><p> 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，江西銅化學(xué)鍍鎳加工處理，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(wú)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。 </p> <p> ②硬度高、耐磨性良好。電鍍鎳層的硬度*為l60～180HV，而化學(xué)鍍鎳層的硬度一般為400～700HV，經(jīng)適當(dāng)熱處理后還可進(jìn)一步提高到接近甚至超過(guò)鉻鍍層的硬度，故耐磨性良好，更難得的是化學(xué)鍍鎳層兼?zhèn)淞肆己玫哪臀g與耐磨性能。 </p> <p> ③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。 </p> <p> ④由于化學(xué)鍍鎳層含磷（硼）量的不同及鍍后熱處理工藝的不同，鍍鎳層的物理化學(xué)特性，如硬度、抗蝕性能、耐磨性能、電磁性能等具有豐富多彩的變化，江西銅化學(xué)鍍鎳加工處理，是其他鍍種少有的，江西銅化學(xué)鍍鎳加工處理。所以，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)。學(xué)鍍鎳是一種化學(xué)溶液，在鋼部件的表面形成一層化學(xué)鍍鎳膜，有效的隔斷鋼部件與腐蝕性介質(zhì)的接觸77.江西銅化學(xué)鍍鎳加工處理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西銅化學(xué)鍍鎳加工處理,化學(xué)鍍鎳" src="https://tyunfile.71360.com/WaterMark/UploadFile/Shzhonglin/637446946627358840/1665760.png"></div><p> <span style="display:none;"></span> </p> <p> <p> 隨著社會(huì)經(jīng)濟(jì)的高速發(fā)展，化工領(lǐng)域也在悄然發(fā)生著變化，化學(xué)鍍鎳與電鍍鎳是化工領(lǐng)域研究的重要對(duì)象。本文將基于介紹化學(xué)鍍鎳與電鍍鎳工藝兩者之間的具體的工藝流程，分別詳細(xì)論述兩者之間所存在的區(qū)別。 </p> <p> 1、化學(xué)鍍鎳與電鍍鎳從原理上的區(qū)別就是電鍍鎳需要外加的電流和陽(yáng)極，而化學(xué)鍍鎳是依靠在金屬表面所發(fā)生的自催化反應(yīng)。 </p> <p> 2、化學(xué)鍍鎳層是極為均勻的，只要鍍液能浸泡得，溶質(zhì)交換充分，鍍層就會(huì)非常均勻，幾乎可以達(dá)到仿形的效果。 </p> <p> <br /> </p> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> 湖南鋁材化學(xué)鍍鎳公司化學(xué)鍍鎳是一種化學(xué)溶液，能與碳鋼等部件發(fā)生化學(xué)反應(yīng)，有效的隔斷鋼部件與腐蝕性介質(zhì)的接觸，達(dá)防腐目的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西銅化學(xué)鍍鎳加工處理,化學(xué)鍍鎳" src="https://tyunfile.71360.com/WaterMark/UploadFile/Shzhonglin/637446945973891955/484417.png"></div><p style="text-indent:25px">在食品加工過(guò)程中，會(huì)涉及鹽水、亞硝酸鹽、檸檬酸、醋酸、天然木材的煙薰，揮發(fā)性有機(jī)酸等腐蝕介質(zhì)等問(wèn)題；食品加工溫度范圍為60～200，生產(chǎn)環(huán)境中相對(duì)濕度很高；在這樣的條件下，食品加工設(shè)備存在著金屬腐蝕、疲勞和磨損等問(wèn)題。對(duì)于接觸食品的金屬表面，傳統(tǒng)的保護(hù)方式是電鍍硬鉻；可是，在含氯離子酸性介質(zhì)中，鍍鉻層的耐蝕年并不好；然而，化學(xué)鍍鎳在均鍍能力、高耐蝕性、防粘、脫模性等方面具有明顯的優(yōu)勢(shì)。揉面機(jī)上與食品接觸的零件采用的化學(xué)鍍鎳就是應(yīng)用成功的實(shí)例之一；其他在食品充氣裝罐機(jī)、螺桿送料機(jī)、拌料鍋、食品模具、烤盤、干燥箱，面包保溫爐等食品機(jī)械上越多地采用了化學(xué)鍍鎳。</p><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(wú)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硬度高、耐磨性良好。電鍍鎳層的硬度*為l60～180HV，而化學(xué)鍍鎳層的硬度一般為400～700HV，經(jīng)適當(dāng)熱處理后還可進(jìn)一步提高到接近甚至超過(guò)鉻鍍層的硬度，故耐磨性良好，更難得的是化學(xué)鍍鎳層兼?zhèn)淞肆己玫哪臀g與耐磨性能。③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。④由于化學(xué)鍍鎳層含磷（硼）量的不同及鍍后熱處理工藝的不同，鍍鎳層的物理化學(xué)特性，如硬度、抗蝕性能、耐磨性能、電磁性能等具有豐富多彩的變化，是其他鍍種少有的。所以，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)。凡需要耐磨，耐蝕的零部件一般都可以用化學(xué)鍍鎳合金層來(lái)提高其壽命4.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西銅化學(xué)鍍鎳加工處理,化學(xué)鍍鎳" src="https://tyunfile.71360.com/WaterMark/UploadFile/Shzhonglin/637446946968579554/4151246.png"></div><p> 五金件在進(jìn)行化學(xué)鎳磷合金的生產(chǎn)過(guò)程中，由于生產(chǎn)的工件不一樣，鍍液的穩(wěn)定性會(huì)有所波動(dòng)而導(dǎo)致鍍液使用壽命下降。那么我們?cè)谏a(chǎn)過(guò)程中有什么方法可以有效延長(zhǎng)鍍液的使用壽命呢？化學(xué)鎳 </p> <p> 1、每天在生產(chǎn)前需對(duì)鍍液進(jìn)行分析和調(diào)整，并進(jìn)行試鍍，確保鍍液的狀態(tài)良好后即可進(jìn)行批量生產(chǎn)。 </p> <p> 2、為了除去鍍液中的有害顆粒，生產(chǎn)過(guò)程中鍍液應(yīng)保持循環(huán)過(guò)濾，并且在下班前鍍液停止電鍍時(shí)檢查并更換濾芯或是倒槽處理。 </p> <p> 3、在生產(chǎn)過(guò)程中應(yīng)及時(shí)打撈掉槽的工件，因?yàn)楣ぜ阱円褐袝?huì)不停地沉積鎳磷合金鍍層，這樣會(huì)影響鍍液的穩(wěn)定性。 </p> <p> <br /> </p> <p> 所以，我們的五金件在進(jìn)行化學(xué)鍍鎳磷合金的生產(chǎn)過(guò)程中可通過(guò)以上這6點(diǎn)，有效延長(zhǎng)鍍液的使用壽命，從而降低生產(chǎn)成本。 </p> <p> <br /> </p> <p> <br /> 學(xué)鍍鎳是一種化學(xué)溶液，在鋼部件的表面形成一層化學(xué)鍍鎳膜，有效的隔斷鋼部件與腐蝕性介質(zhì)的接觸55.黃銅化學(xué)鍍鎳加工</p><p style="text-indent:25px">學(xué)鍍鎳是一種化學(xué)溶液，在鋼部件的表面形成一層化學(xué)鍍鎳膜，有效的隔斷鋼部件與腐蝕性介質(zhì)的接觸8.江西銅化學(xué)鍍鎳加工處理</p><p> 化學(xué)鎳中發(fā)展**快的一種，鍍液一般以硫酸鎳、乙酸鎳等為主鹽，次亞磷酸鹽、硼氫化鈉、硼烷、肼等為還原劑，再添加各種助劑，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)。 </p> <p> 以使用還原劑的不同分為化學(xué)鍍鎳-磷、化學(xué)鍍鎳-硼兩大類，鍍層在均勻性、耐蝕性、硬度、可焊性、磁性、裝飾性上都顯示出優(yōu)越性。 </p> <p> ⑴機(jī)理 </p> <p> 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?；瘜W(xué)鍍鎳可以選用多種還原劑，工業(yè)上應(yīng)用**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“原子氫理論”和“氫化物理論”。 </p> <p> 1）原子氫理論 </p> <p> 原子氫理論認(rèn)為，溶液中的Ni2+靠還原劑次磷酸鈉（NaH2P02）放出的原子態(tài)活性氫還原為金屬鎳，而不是H2PO2-與Ni2+直接作用。 </p> <p> 首先是在加熱條件下，次磷酸鈉在催化表面上水解釋放出原子氫，或由H 2PO2-催化脫氫產(chǎn)生原子氫，即 </p> <p> 然后，吸附在活性金屬表面上的H原子還原Ni2+為金屬Ni沉積于鍍件表面．同時(shí)次磷酸根被原子氫還原出磷，或發(fā)生自身氧化還原反應(yīng)沉積出磷，H2的析出既可以是由H2POf水解產(chǎn)生，也可以是由原子態(tài)的氫結(jié)合而成。江西銅化學(xué)鍍鎳加工處理</p><p style="text-indent:25px">上海眾霖五金有限公司致力于五金、工具，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。上海眾霖五金深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的鍍鎳，鍍金，鍍錫，鍍銀。上海眾霖五金繼續(xù)堅(jiān)定不移地走高質(zhì)量發(fā)展道路，既要實(shí)現(xiàn)基本面穩(wěn)定增長(zhǎng)，又要聚焦關(guān)鍵領(lǐng)域，實(shí)現(xiàn)轉(zhuǎn)型再突破。上海眾霖五金始終關(guān)注五金、工具市場(chǎng)，以敏銳的市場(chǎng)洞察力，實(shí)現(xiàn)與客戶的成長(zhǎng)共贏。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3070437.html</p></div></div></div></div></div><div id="v29y3gn" class="page-right twoColRt"><div id="tawtvcb" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rbt3ewy" 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="gqda3nk" class="recomPic 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