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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>浙江省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>深圳錫膏助焊劑,助焊劑</p><p><span>***更新：</span>2020-09-07 07:08:05</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="3xur779" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">杭州正盟環(huán)保工程有限公司</a></p><p><span>聯(lián)系人：</span>李先生</p><p><span>郵箱: </span></p><p><span>電話: </span>13771706346</p><p><span>傳真: </span>0571_</p><p><span>網(wǎng)址: </span>http://www.hzzmhbgc.com</p><p><span>手機: </span>0571-88117763</p><p><span>地址: </span>順風路528號2號樓南樓東向3層</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="e9hb7m4" class="page-proshow02"><p class="title">詳細說明</p><div id="rs4v8rl" class="box"><p><p style="text-indent:25px">【正盟環(huán)?！侩娮庸I(yè)助焊劑之如何從技術(shù)性能指標的角度選擇助焊劑？(一) 助焊劑是電子工業(yè)中相當重要的輔助材料之一，它在電子裝配工藝中影響電子產(chǎn)品質(zhì)量與可靠性，深圳錫膏助焊劑。隨著現(xiàn)代信息電子工業(yè)的迅猛發(fā)展，助焊劑的使用量大要求越來越高。如何能在眾多的助焊劑中挑選一款適合自己所需要的產(chǎn)品，滿足波峰焊工藝使用，從技術(shù)性能指標的角度可供初步參考篩選?到適合的產(chǎn)品，深圳錫膏助焊劑，首先需要正確理解其各項技術(shù)性能指標： PH值：助焊劑去除焊接金屬表面的金屬氧化物通過酸性反應，酸性越強PH值越低，助焊劑的去氧化能力則越強，但同時帶來的過反應的問題而把金屬基材腐蝕。故助焊劑酸性的大小應與金屬材料敏感性相匹配，精密焊接不宜選擇酸性太強的助焊劑，深圳錫膏助焊劑，或者焊后需要進行清洗。杭州正盟環(huán)保工程有限公司坐落于杭州錢江經(jīng)濟開發(fā)區(qū)。深圳錫膏助焊劑</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳錫膏助焊劑,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520275830078/3192344.jpg"></div><p style="text-indent:25px">【正盟環(huán)保】低松香型免清洗助焊劑是一種專為用于機器焊接高級多層電路板的助焊劑。此類助焊劑助焊能力強，發(fā)泡性能好，不含鹵素，在焊接時產(chǎn)生的煙霧和其殘余物對焊料和裸銅無腐蝕性，在較高的預熱溫度100℃～130℃時得到狀態(tài)。因此，它是一種較理想的免清洗助焊劑，在板子上具有極高的表面絕緣阻抗以及快干的效果，板子的粘膩感亦可以減少到低的程度，能夠輕易地通過測試程序，適用于任何**線路板波峰焊、噴焊及手工焊。該助焊劑中溶劑既要對焊接表面具有良好的保護作用，又要有適當?shù)酿ざ?。高沸點的醇保護效果較好，但黏度大、使用不便；低沸點的醇黏度低，但保護性差，因而可以考慮選擇混合醇的方法。有資料表明，乙醇、乙二醇、丙三醇和乙二醇丁醚的配比(質(zhì)量比)為2:8:8:1的混合溶劑效果上佳。深圳錫膏助焊劑買助焊劑，找杭州正盟環(huán)保工程有限公司！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳錫膏助焊劑,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520275605468/6502823.jpg"></div><p style="text-indent:25px">【正盟環(huán)?！渴裁词敲馇逑?，什么是免清洗助焊劑免清洗是指在電子裝聯(lián)生產(chǎn)中采用低固態(tài)含量、無腐蝕性的助焊劑，在惰性氣體環(huán)境下焊接，焊后電路板上的殘留物極微、無腐蝕，且具有極高的表面絕緣電阻（SIR），一般情況下不需要清洗既能達到離子潔凈度的標準（美軍標MIL-P-228809離子污染等級劃分為：一級≤1.5ugNaCl/cm2無污染；二級≤1.5～5.0ugNACl/cm2質(zhì)量高；三級≤5.0～10.0ugNaCl/cm2符合要求；四級>10.0ugNaCl/cm2不干凈），可直接進入下道工序的工藝技術(shù)。必須指出的是“免清洗”與“不清洗”是相對不同的2個概念，所謂“不清洗”是指在電子裝聯(lián)生產(chǎn)中采用傳統(tǒng)的松香助焊劑（RMA）或有機酸助焊劑，焊接后雖然板面留有一定的殘留物，但不用清洗也能滿足某些產(chǎn)品的質(zhì)量要求，如家用電子產(chǎn)品、專業(yè)聲視設備、低成本辦公設備等產(chǎn)品，它們生產(chǎn)時通常是“不清洗”的，但相對不是“免清洗”。</p><p style="text-indent:25px">【正盟環(huán)?！恐竸┏煞?近幾十年來，在電子產(chǎn)品生產(chǎn)錫焊工藝過程中，一般多使用主要由松香、樹脂、含鹵化物的活性劑、添加劑和有機溶劑組成的松香樹脂系助焊劑.這類助焊劑雖然可焊性好，成本低，但焊后殘留物高.其殘留物含有鹵素離子，會逐步引起電氣絕緣性能下降和短路等問題，要解決這一問題，必須對電子印制板上的松香樹脂系助焊劑殘留物進行清洗.這樣不但會增加生產(chǎn)成本，而且清洗松香樹脂系助焊劑殘留的清洗劑主要是氟氯化合物.這種化合物是大氣臭氧層的損耗物質(zhì)，屬于禁用和被淘汰之列.仍有不少公司沿用的工藝是屬于前述采用松香樹指系助焊劑焊錫再用清洗劑清洗的工藝，效率較低而成本偏高。環(huán)保級助焊劑現(xiàn)貨供應廠家直銷。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳錫膏助焊劑,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520275439453/9758486.jpg"></div><p style="text-indent:25px">【正盟環(huán)?！恐竸┑姆N類很多，大體上可分為有機、無機和樹脂三大系列。 1、無機：無機系列助焊劑的化學作用強，助焊性能非常好，但腐蝕作用大，屬于酸性焊劑。由于它溶解于水，所以又稱為水溶性助焊劑，它包括無機酸和無機鹽兩種。含有無機酸的助焊劑的主要成分是鹽酸、氫氟酸等，含有無機鹽的助焊劑的主要成分是氯化鋅、氯化銨等，它們使用后必須立即進行非常嚴格的清洗，因為任何殘留在被焊件上的鹵化物都會引起嚴重的腐蝕。無機系列助焊劑通常只用于非電子產(chǎn)品的焊接，在電子設備的裝聯(lián)中嚴禁使用這類無機系列的助焊劑。正盟環(huán)保，現(xiàn)貨供應，***助焊劑。湖州高溫助焊劑</p><p style="text-indent:25px">***環(huán)保級助焊劑生產(chǎn)加工，現(xiàn)貨批發(fā)。深圳錫膏助焊劑</p><p style="text-indent:25px">【正盟環(huán)保】電子工業(yè)助焊劑之如何從技術(shù)性能指標的角度選擇助焊劑？(三) 銅鏡腐蝕性：助焊劑的腐蝕性大小是對酸性強弱對基材影響的進一步驗證，衡量腐蝕性大小一般是在使用相當普遍的基材銅上做銅鏡腐蝕試驗。這項指標也是需要在腐蝕性和可焊性之間做權(quán)衡。表面絕緣電阻：表面絕緣電阻的反應的是助焊劑焊后產(chǎn)品可靠性，按照不同的測試標準對表面絕緣電阻值的要求也不一樣，按照GBT9491-2002標準SIR大于1011Ω，而按照IPC J-STD-004標準，SIR大于108Ω，因測試方法不同，兩者的對比并無意義。但可以確定的是SIR值是越大對焊后產(chǎn)品越有利。電化學遷移：電化學遷移也是對表面絕緣電阻值的進一步要求，在更極端的環(huán)境下考察助焊劑的表面絕緣電阻。當然該項指標亦越大對焊后產(chǎn)品越有利。除上述詳細的技術(shù)參數(shù)的考慮，其次還需結(jié)合所需要裝配的電子產(chǎn)品的類別或技術(shù)要求，選擇合適的助焊劑產(chǎn)品；需要對所選助焊劑，進行試驗驗證和有效評估。深圳錫膏助焊劑</p><p style="text-indent:25px">杭州正盟環(huán)保工程有限公司主要經(jīng)營范圍是環(huán)保，擁有一支專業(yè)技術(shù)團隊和良好的市場口碑。公司業(yè)務涵蓋助焊劑，錫絲，錫條，錫膏等，價格合理，品質(zhì)有保證。公司從事環(huán)保多年，有著創(chuàng)新的設計、強大的技術(shù)，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產(chǎn)品及服務。正盟環(huán)保秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1188534.html</p></div></div></div></div></div><div id="l4ovnzw" class="page-right twoColRt"><div id="wtnzrdk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="v9t7839" 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" 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