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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qsx27k9" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520274472656/4640738.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dt9bta2" 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>南京助焊劑價格,助焊劑</p><p><span>***更新：</span>2020-08-24 20:16:38</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="pfjso8g" 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(jī): </span>0571-88117763</p><p><span>地址: </span>順風(fēng)路528號2號樓南樓東向3層</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="z8jgn4g" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="bsgx88c" class="box"><p><p style="text-indent:25px">【正盟環(huán)保】助焊劑各成分的作用之有機(jī)酸酸類活性劑（如鹵酸、羧酸、磺酸）主要是因?yàn)镠+和氧化物反應(yīng)，例如[3]：有機(jī)酸的羧基和金屬離子以金屬皂的形式除去焊盤和焊料的氧化膜： CuO＋2RCOOH→Cu(RCOO)2 ＋H 2 O 隨后有機(jī)酸銅發(fā)生分解，南京助焊劑價格，吸收氫氣，并生成有機(jī)酸與金屬銅： Cu(RCOO)2＋H2＋M→2RCOOH＋M－Cu 松香（Colophony）用分子式表示為C 19 H29COOH，由于它含有羧基，使得它在一定的溫度下，有一定的助焊作用；同時松香是一種大分子多環(huán)化合物，因此它具有一定的成膜性，在焊接過程中傳遞熱量和起覆蓋作用，能保護(hù)去除氧化膜后的金屬不再重新被氧化。現(xiàn)在有單一有機(jī)酸作活化劑，也有混酸用作活化劑。這些酸的沸點(diǎn)和分解溫度有一定的差異，這樣組合，可以使助焊劑的沸點(diǎn)和活化劑分解溫度呈一個較大的區(qū)間分布，南京助焊劑價格。杭州正盟環(huán)保，南京助焊劑價格，專業(yè)生產(chǎn)***，環(huán)保級助焊劑。南京助焊劑價格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京助焊劑價格,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520274472656/4640738.jpg"></div><p style="text-indent:25px">【正盟環(huán)?！恐竸└鞒煞值淖饔弥袡C(jī)胺與酸復(fù)配使用有機(jī)胺本身含有氨基-NH︰具有活性，加入有機(jī)胺可促進(jìn)焊接效果。為了減小助焊劑對銅板的腐蝕作用，可在配制的助焊劑中加入一定量的緩蝕劑，緩蝕劑通常選擇有機(jī)胺。有機(jī)酸和有機(jī)胺混合會發(fā)生中和反應(yīng)，生成中和產(chǎn)物。這種中和產(chǎn)物是不穩(wěn)定的，在焊接溫度下會迅速分解，重新生成有機(jī)酸和有機(jī)胺，這樣就能保證有機(jī)酸原有的活性，焊接結(jié)束后，剩余的有機(jī)酸又會被有機(jī)胺中和，使殘留物的酸性下降，減少腐蝕。因此加入了有機(jī)胺類以后，不*可以調(diào)節(jié)助焊劑的酸度，可以使焊點(diǎn)光亮，在不降低焊劑活性的情況下，焊后腐蝕性降至低。南京助焊劑價格杭州正盟環(huán)保工程有限公司坐落于杭州錢江經(jīng)濟(jì)開發(fā)區(qū)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京助焊劑價格,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520274609375/2746468.jpg"></div><p style="text-indent:25px">【正盟環(huán)?！恐竸┳饔?助焊劑中的主要起作用成分是松香，松香在260攝氏度左右會被錫分解，因此錫槽溫度不要太高．助焊劑是一種促進(jìn)焊接的化學(xué)物質(zhì)。在焊錫中，它是一種不可缺少的輔助材料，其作用極為重要。溶解焊母氧化膜在大氣中，被焊母材表面總是被氧化膜覆蓋著，其厚度大約為2×10-9～2×10-8m。在焊接時，氧化膜必然會阻止焊料對母材的潤濕，焊接就不能正常進(jìn)行，因此必須在母材表面涂敷助焊劑，使母材表面的氧化物還原，從而達(dá)到消除氧化膜的目的。被焊母材再氧化母材在焊接過程中需要加熱，高溫時金屬表面會加速氧化，因此液態(tài)助焊劑覆蓋在母材和焊料的表面可防止它們氧化。</p><p style="text-indent:25px">【正盟環(huán)?！渴裁词敲馇逑粗竸?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(dá)到離子潔凈度的標(biāo)準(zhǔn)（美軍標(biāo)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(jìn)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(jī)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(shè)備、低成本辦公設(shè)備等產(chǎn)品，它們生產(chǎn)時通常是“不清洗”的，并不是“免清洗”。熱誠歡迎各界朋友前來參觀、考察、治談業(yè)務(wù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京助焊劑價格,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520274921875/6047117.jpg"></div><p style="text-indent:25px">【正盟環(huán)?！磕壳皣鴥?nèi)常用的可靠性評價試驗(yàn)主要為：表面絕緣阻抗測試，其次銅鏡腐蝕測試、離子濃度測試、軟釬焊性試驗(yàn)等。銅鏡腐蝕測試將欲測試的免清洗助焊劑滴在銅板(40.0mm×40.0 mm×0.2 mm)上，使其自然漫流，然后放人80℃的烘箱中烘2 h，取出冷卻后再放入潮濕箱(溫度40℃，濕度93%)中72 h查看銅板的顏色變化，如顏色變?yōu)樯罹G，則發(fā)生了腐蝕，如顏色無變化或有殘?jiān)?，則表明未發(fā)生腐蝕現(xiàn)象。不粘附性試驗(yàn) 將粉筆末撒到此種涂有免清洗助焊劑焊料的表面，然后擦去，不粘附；用紗布方法試驗(yàn)，紗布上看不到助焊劑殘留物，試板上也無明顯紗布痕跡。說明此種免清洗助焊劑的不粘附性性能優(yōu)良。軟釬焊性試驗(yàn) 在涂有免清洗助焊劑的清潔銅板(50 mm×50mm×1 mm)**放上HLSnPb50(D8 mm×4 mm)釬料，釬料上分別滴上兩滴助焊劑，然后置于275℃的恒溫箱內(nèi)1 min，取出測其漫流面積，據(jù)此可判斷助焊性能的強(qiáng)弱。助焊劑，杭州正盟環(huán)保生產(chǎn)國標(biāo)環(huán)保助焊劑。寧波助焊劑特性</p><p style="text-indent:25px">買助焊劑，找杭州正盟環(huán)保工程有限公司！南京助焊劑價格</p><p style="text-indent:25px">【正盟環(huán)?！俊局竸┬≈R】助焊劑在PCB行業(yè)中應(yīng)用極廣，其品質(zhì)直接影響電子工業(yè)的整個生產(chǎn)過程和產(chǎn)品質(zhì)量。隨著RoHS 和WEEE指令的實(shí)行，無鉛化對助焊劑的性能提出了更高的要求，助焊劑已由傳統(tǒng)的松香型向無鹵、無松香、免清洗、低固含量方向發(fā)展，其組成也隨之發(fā)生了相應(yīng)的變化，各組分的相互作用，使助焊劑的性能更加優(yōu)良。 1、助焊劑的基本組成國內(nèi)外助焊劑一般由活化劑、溶劑、表面活性劑和特殊成分組成。特殊成分包括緩蝕劑、防氧化劑、成膜劑等。南京助焊劑價格</p><p style="text-indent:25px">杭州正盟環(huán)保工程有限公司位于浙江省杭州市，注冊資本300-500萬元，旗下?lián)碛?1~50人優(yōu)異專業(yè)的員工。在正盟環(huán)保近多年發(fā)展歷史，公司旗下現(xiàn)有品牌正盟,正盟環(huán)保等。公司不**提供專業(yè)的杭州正盟環(huán)保工程有限公司成立于1992年，坐落于杭州錢江經(jīng)濟(jì)開發(fā)區(qū)。多年公司秉承“誠信、創(chuàng)新、品質(zhì)、分享”的企業(yè)理念，依托區(qū)位、研發(fā)、生產(chǎn)、營銷等相對優(yōu)勢，致力于“產(chǎn)、學(xué)、研”相結(jié)合和科研成果的轉(zhuǎn)化，先后與同濟(jì)大學(xué)環(huán)境科學(xué)與工程學(xué)院、原化工部成都研究所等學(xué)術(shù)機(jī)構(gòu)建立技術(shù)合作關(guān)系，在電子化學(xué)、環(huán)境功能材料等領(lǐng)域成績斐然。公司有同濟(jì)大學(xué)聯(lián)合實(shí)驗(yàn)室、科研成果孵化基地。成產(chǎn)基地、工程中心和銷售中心組成，擁有多項(xiàng)自主知識產(chǎn)權(quán)和新型實(shí)用技術(shù)，多臺套先進(jìn)生產(chǎn)、分析、檢測、計量設(shè)備，嚴(yán)格依照ISO090001:2000質(zhì)量保證體系運(yùn)行。正盟公司以先進(jìn)實(shí)用技術(shù)、質(zhì)量穩(wěn)定的產(chǎn)品和及時質(zhì)量的服務(wù)在業(yè)界廣受贊譽(yù)，產(chǎn)品廣泛應(yīng)用于電子、通訊、信息、航空航天、醫(yī)藥、石化等領(lǐng)域，取得良好市場反響和經(jīng)驗(yàn)業(yè)績。今后將繼續(xù)堅(jiān)持技術(shù)創(chuàng)新、品質(zhì)提升和優(yōu)化市場響應(yīng)，竭力為客戶帶來嶄新體驗(yàn)，不斷為客戶提供質(zhì)量產(chǎn)品。竭誠歡迎新老客戶和社會各界朋友蒞臨我司參觀考察，指導(dǎo)交流，期待與您攜手、共創(chuàng)輝煌明天。,同時還建立了完善的售后服務(wù)體系,為客戶提供質(zhì)量的產(chǎn)品和服務(wù)。自公司成立以來，一直秉承“以質(zhì)量求生存，以信譽(yù)求發(fā)展”的經(jīng)營理念，始終堅(jiān)持以客戶的需求和滿意為重點(diǎn)，為客戶提供質(zhì)量的助焊劑,錫絲,錫條,錫膏，從而使公司不斷發(fā)展壯大。</p></p><br 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