衢州求購(gòu)助焊劑正盟環(huán)保杭州正盟環(huán)保工程供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="【正盟環(huán)保】免清洗助焊劑③可焊性：擴(kuò)展率≥80%可焊性與腐蝕性是相互矛盾的一對(duì)指標(biāo)，為了使助焊劑具有一定的消除氧化物的能力，并且在預(yù)熱和焊接的整個(gè)過(guò)程中均能保持一定程度的活性，就必須包含某種酸。在免清洗助焊劑中用得多的是非水溶性醋酸系列，配"><meta name="keywords" content="衢州求購(gòu)助焊劑,助焊劑"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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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>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>衢州求購(gòu)助焊劑,助焊劑</p><p><span>***更新：</span>2020-09-04 14:14:07</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="m7jsofg" 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(huà): </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(hào)2號(hào)樓南樓東向3層</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="pxjv289" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="xuaryp2" class="box"><p><p style="text-indent:25px">【正盟環(huán)保】免清洗助焊劑 ③可焊性：擴(kuò)展率≥80% 可焊性與腐蝕性是相互矛盾的一對(duì)指標(biāo)，為了使助焊劑具有一定的消除氧化物的能力，并且在預(yù)熱和焊接的整個(gè)過(guò)程中均能保持一定程度的活性，就必須包含某種酸。在免清洗助焊劑中用得多的是非水溶性醋酸系列，配方中可能還有胺、氨和合成樹(shù)脂，不同的配方會(huì)影響其活性和可靠性。不同的企業(yè)有不同的要求和內(nèi)部控制指標(biāo)，但必須符合焊接質(zhì)量高和無(wú)腐蝕性的使用要求。助焊劑的活性通常是用pH值來(lái)衡量的，免清洗助焊劑的pH值應(yīng)控制在產(chǎn)品規(guī)定的技術(shù)條件范圍內(nèi)（各生產(chǎn)廠(chǎng)家的pH值略有不同）。 ④符合環(huán)保要求：無(wú)毒，衢州求購(gòu)助焊劑，衢州求購(gòu)助焊劑，無(wú)強(qiáng)烈刺激性氣味，基本不污染環(huán)境，衢州求購(gòu)助焊劑，操作安全。環(huán)保級(jí)助焊劑現(xiàn)貨供應(yīng)廠(chǎng)家直銷(xiāo)。衢州求購(gòu)助焊劑</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州求購(gòu)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)?！恐竸╢lux）：在焊接工藝中能幫助和促進(jìn)焊接過(guò)程，同時(shí)具有保護(hù)作用、阻止氧化反應(yīng)的化學(xué)物質(zhì)。助焊劑可分為固體、液體和氣體。主要有“輔助熱傳導(dǎo)”、“去除氧化物”、“降低被焊接材質(zhì)表面張力”、“去除被焊接材質(zhì)表面油污、增大焊接面積”、“防止再氧化”等幾個(gè)方面，在這幾個(gè)方面中比較關(guān)鍵的作用有兩個(gè)就是：“去除氧化物”與“降低被焊接材質(zhì)表面張力”。助焊劑通常是以松香為主要成分的混合物，是保證焊接過(guò)程順利進(jìn)行的輔助材料。焊接是電子裝配中的主要工藝過(guò)程，助焊劑是焊接時(shí)使用的輔料，助焊劑的主要作用是去除焊料和被焊母材表面的氧化物，使金屬表面達(dá)到必要的清潔度.它防止焊接時(shí)表面的再次氧化，降低焊料表面張力，提高焊接性能.助焊劑性能的優(yōu)劣，直接影響到電子產(chǎn)品的質(zhì)量。衢州求購(gòu)助焊劑買(mǎi)助焊劑認(rèn)準(zhǔn)正盟牌。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州求購(gòu)助焊劑,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520275449218/8342179.jpg"></div><p style="text-indent:25px">【正盟環(huán)保】【助焊劑小知識(shí)】助焊劑各成分的作用被焊金屬工件表面存在氧化物、灰塵等污垢，阻礙工件基體金屬和焊料之間以原子狀態(tài)相互擴(kuò)散，因此必須去除氧化物等以使表面清潔露出金屬基體，但是被清潔的金屬基體表面的原子在大氣中又立刻被氧化，在焊接溫度下，氧化速度更快。所以在焊接過(guò)程中加入助焊劑，用來(lái)協(xié)助提供沒(méi)有氧化層的金屬表面，并保持這些表面的無(wú)氧化物狀態(tài)，直到焊錫與金屬表面完成焊接過(guò)程。同時(shí)依靠焊劑的化學(xué)作用，與被焊金屬表面的氧化物化合，在焊接溫度下形成液態(tài)化合物，使被焊金屬部位表面的金屬原子與熔融焊料的原子相互擴(kuò)散，以達(dá)到錫焊連接的目的。在焊接過(guò)程中助焊劑還能促進(jìn)焊錫的流動(dòng)和擴(kuò)散，通過(guò)減小表面不平度來(lái)影響焊錫表面張力在焊錫擴(kuò)散方向上的平衡。理想的助焊劑除化學(xué)活性外，還要具有良好的熱穩(wěn)定性、粘附力、擴(kuò)展力、電解活性、環(huán)境穩(wěn)定性、化學(xué)官能團(tuán)及其反應(yīng)特性、流變特性、對(duì)通用清洗溶液和設(shè)備的適應(yīng)性等。助焊劑的上述作用都是通過(guò)其中的活化劑、溶劑、表面活性劑等成分的作用來(lái)實(shí)現(xiàn)的。</p><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(wú)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(wú)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(jí)劃分為：一級(jí)≤1.5ugNaCl/cm2無(wú)污染；二級(jí)≤1.5～5.0ugNACl/cm2質(zhì)量高；三級(jí)≤5.0～10.0ugNaCl/cm2符合要求；四級(jí)>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”是相對(duì)不同的2個(gè)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(mǎn)足某些產(chǎn)品的質(zhì)量要求，如家用電子產(chǎn)品、專(zhuān)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(shí)通常是“不清洗”的，但相對(duì)不是“免清洗”。正盟環(huán)保，現(xiàn)貨供應(yīng)，***助焊劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州求購(gòu)助焊劑,助焊劑" src="https://tyunfile.71360.com/UploadFile/zhengmenghuanbao1/637334520274804687/3589720.jpg"></div><p style="text-indent:25px">【正盟環(huán)保】電烙鐵焊接過(guò)程中，如何選擇助焊劑？焊錫材料是電子行業(yè)的生產(chǎn)與維修工作中必不可少的，在電烙鐵的使用過(guò)程中，我們經(jīng)常會(huì)用到。焊錫膏---膏狀粘稠體，主要成分金屬粉末、松香、有機(jī)酸、觸變劑、活性劑。用于SMT自動(dòng)貼裝工藝的焊接。助焊劑是統(tǒng)稱(chēng)，松香、焊錫膏都屬于助焊劑，關(guān)鍵的用途是增加焊接時(shí)焊料與被焊物體的浸潤(rùn)效果(浸潤(rùn)不佳的話(huà),焊錫不能很好的附著在被焊物體上，出現(xiàn)圓圓的球狀,很容易虛焊)。其他還有比如去除氧化、輔助熱傳導(dǎo)、降低金屬表面張力、使焊點(diǎn)美觀(guān)等等。助焊劑分成三大類(lèi)：一是無(wú)機(jī)助焊劑，二是有機(jī)助焊劑，三是松香。正盟牌助焊劑，杠杠的。杭州噴錫助焊劑</p><p style="text-indent:25px">環(huán)保級(jí)助焊劑，可免除清洗工序，進(jìn)而節(jié)約制造商的生產(chǎn)費(fèi)用和工作時(shí)間。衢州求購(gòu)助焊劑</p><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(duì)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(huì)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(huì)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(huì)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(lèi)以后，不僅可以調(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。衢州求購(gòu)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(yíng)范圍是環(huán)保，擁有一支專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下助焊劑，錫絲，錫條，錫膏深受客戶(hù)的喜愛(ài)。公司從事環(huán)保多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專(zhuān)業(yè)化的隊(duì)伍，確保為客戶(hù)提供良好的產(chǎn)品及服務(wù)。正盟環(huán)保秉承“客戶(hù)為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營(yíng)理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1154190.html</p></div></div></div></div></div><div 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