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src="https://tyunfile.71360.com/WaterMark/UploadFile/ganghaowuzi2020/637334347130126953/9107014.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="au29vs2" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ganghaowuzi2020/637334347130126953/9107014.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2w8uwdf" 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>云南省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>昆明40鍍鋅圓管廠家直銷,鍍鋅圓管</p><p><span>***更新：</span>2021-01-02 02:09:37</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="i3x8bta" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">昆明鋼好物資有限公司</a></p><p><span>聯(lián)系人：</span>李磊</p><p><span>郵箱: </span>85850936@qq.com</p><p><span>電話: </span>13099998807</p><p><span>傳真: </span>185_</p><p><span>網(wǎng)址: </span>http://ganghaowuzi2020.shop.88360.com</p><p><span>手機(jī): </span>185-9311</p><p><span>地址: </span>經(jīng)濟(jì)技術(shù)開發(fā)區(qū)王家營(yíng)火車站旁</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="r2lvrjl" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="g32eqxz" class="box"><p><p> 你知道鍍鋅圓管在鍍鋅時(shí)都有哪些特點(diǎn)嗎？ </p> <p> 鍍鋅圓管鍍鋅特點(diǎn)要求，鍍鋅圓管鋅鍍層的外觀呈青白色，標(biāo)準(zhǔn)電極電位為-0.76V，易溶于酸，溶于堿，是典型的兩性金屬。鋅在干燥空氣中幾乎不發(fā)生變化，鋅腐蝕的臨界濕度大于70%，因此在潮濕大氣中能與二氧化碳和氧作用生成一層主要由堿式碳酸鋅組成的薄膜，這層膜有一定的緩蝕作用，鋅與硫化氫等含硫化物起反應(yīng)生成硫化鋅﹔鋅易受氯離子浸蝕，故在海水中不穩(wěn)定。 </p> <p> 鍍鋅圓管的鋅在密閉或通風(fēng)不良，空氣潮濕的條件下，與非金屬材料的揮發(fā)物(低分子羧酸，醛，昆明40鍍鋅圓管廠家直銷，酚，氨等)接觸時(shí)，鋅易遭腐蝕，生成白色疏松的腐蝕產(chǎn)物，俗稱”白霜”，昆明40鍍鋅圓管廠家直銷。鋅在高溫，高濕，密閉條件下，昆明40鍍鋅圓管廠家直銷，與膠木，油漆，木材釋放的揮發(fā)物接觸，鋅有生長(zhǎng)細(xì)絲狀單晶的傾向，俗稱”長(zhǎng)毛” 。許多新的鋼結(jié)構(gòu)工程現(xiàn)在都直接使用鍍鋅圓管，這樣可以節(jié)省時(shí)間。它會(huì)持續(xù)更久。昆明40鍍鋅圓管廠家直銷</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明40鍍鋅圓管廠家直銷,鍍鋅圓管" src="https://tyunfile.71360.com/WaterMark/UploadFile/ganghaowuzi2020/637334347130126953/9107014.png"></div><p> 鍍鋅圓管的焊接注意事項(xiàng)：焊接前必須拋光焊縫。焊接位置的鍍鋅層必須打磨掉，否則會(huì)出現(xiàn)氣泡、砂眼、假焊等。會(huì)發(fā)生。它還會(huì)使焊縫變脆并降低剛性。 </p> <p> 鍍鋅圓管焊接特性分析： </p> <p> 一般來說，鍍鋅圓管在低碳鋼外面涂有一層鋅，鍍鋅層一般為20um厚。鋅的熔點(diǎn)為419℃，沸點(diǎn)約為908℃。在焊接中，鋅熔化成液體，漂浮在熔池表面或焊縫根部。鋅在鐵中有很大的固體溶解度。液態(tài)鋅將沿著晶界腐蝕焊接金屬，低熔點(diǎn)鋅將形成“液態(tài)金屬脆化”。 </p> <p> 同時(shí)，鋅和鐵會(huì)在金屬間形成脆性化合物。這些脆性相會(huì)降低焊接金屬的塑性，并在拉伸應(yīng)力下導(dǎo)致裂紋。 </p> <p> 如果角焊縫是焊接的，尤其是丁字接頭角焊縫，有可能產(chǎn)生貫穿裂紋。鍍鋅圓管焊接過程中，坡口表面和邊緣的鋅層在電弧加熱的作用下會(huì)氧化、熔化、蒸發(fā)，甚至?xí)l(fā)出白煙和蒸汽，容易造成焊縫氣孔。 </p> <p> 氧化形成的氧化鋅具有高熔點(diǎn)，約高于1800℃。如果焊接過程中參數(shù)太小，會(huì)導(dǎo)致氧化鋅渣夾雜。因?yàn)殇\變成了脫氧劑。產(chǎn)生Feo-mno或feo-mno-sio2低熔點(diǎn)氧化物渣。其次，由于鋅的蒸發(fā)，大量的白煙和灰塵被排放出來，這對(duì)人體有刺激和有害的影響。因此，焊接位置的鍍鋅層必須打磨掉。昆明40鍍鋅圓管廠家直銷鍍鋅圓管焊接前的準(zhǔn)備與低碳鋼相同。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明40鍍鋅圓管廠家直銷,鍍鋅圓管" src="https://tyunfile.71360.com/WaterMark/UploadFile/ganghaowuzi2020/637334348541689453/9169853.png"></div><p> 鍍鋅鋼管的鋅鍍層的使用溫度不得超過2500C,在此溫度上鋅結(jié)晶組織變形，發(fā)脆，耐蝕性下降。有耐蝕，耐熱要求的零件宜用Zn-Ni合金層。鍍鋅電解液可分為堿性和弱酸性兩大類，國(guó)內(nèi)外常用的有無氰鋅酸鹽鍍鋅，**鍍鋅，銨鹽鍍鋅，氯化物鍍鋅，硫酸鹽鍍鋅等。就國(guó)內(nèi)而言，無氰鋅酸鹽鍍鋅仍是主流。近年來由于鍍鋅添加劑的性能的改進(jìn)提高，氯化物鍍鋅和低氰光亮鍍鋅發(fā)展較快，而銨鹽鍍鋅在繼續(xù)下降。 </p> <p> 選擇鍍液要根據(jù)鍍件材質(zhì)，形狀，外觀要求而定，如沖壓小件和復(fù)雜件，特別是需要輔**極的深孔或管狀件宜選用堿性鍍液﹔對(duì)氫脆敏感的零件宜用弱酸性鍍鋅液。當(dāng)采用兩種性能不同的鍍液時(shí)，對(duì)鍍鋅鋼管生產(chǎn)十分有利。 </p><p> 如何控制鍍鋅圓管的焊接過程？ </p> <p> 鍍鋅圓管焊接前的準(zhǔn)備與普通低碳鋼相同。必須小心處理凹槽尺寸和附近的鍍鋅層。為了達(dá)到滲透，溝槽尺寸應(yīng)適當(dāng)，一般為60 ~ 65，有一定間隙，一般為1.5 ~ 2.5毫米；為了減少鋅滲透到焊縫中，可以在焊接前去除凹槽中的鍍鋅層。 </p> <p> 在實(shí)際監(jiān)理工作中，集中控制采用集中倒角和無鈍邊。雙層焊接工藝降低了不完全穿透的可能性。 </p> <p> 電極應(yīng)根據(jù)鍍鋅管的基材選擇。一般來說，J422因其可操作性而普遍用于低碳鋼。 </p> <p> 焊接方法:在焊接第壹層多層焊接時(shí)，盡量熔化鋅層，使其汽化蒸發(fā)，從焊縫中逸出，這樣可以很大程度上減少焊縫中殘留的液態(tài)鋅。 </p> <p> 焊接角焊縫時(shí)，鋅層應(yīng)盡可能在第壹層熔化、蒸發(fā)和蒸發(fā)，以從焊縫中逸出。方法是將電極末端向前移動(dòng)約5 ~ 7毫米。當(dāng)鋅層熔化時(shí)，應(yīng)返回到原始位置并繼續(xù)向前焊接。 </p> <p> 如果短熔渣電極，如J427，用于交叉焊接和垂直焊接，底切趨勢(shì)將非常?。蝗绻捎们昂髱Р倪\(yùn)輸技術(shù)，可以獲得無缺陷的焊接質(zhì)量。昆明鍍鋅圓管批發(fā)產(chǎn)市場(chǎng)，云南鍍鋅圓管報(bào)價(jià)表，昆明鋼好物資供應(yīng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明40鍍鋅圓管廠家直銷,鍍鋅圓管" src="https://tyunfile.71360.com/WaterMark/UploadFile/ganghaowuzi2020/637334346899960937/332949.png"></div><p style="text-indent:25px">鍍鋅圓管的工藝特點(diǎn)之硫酸鹽鍍鋅的轉(zhuǎn)化。硫酸鹽電鍍鋅鐵合金中只保留硫酸鹽鍍鋅的主鹽硫酸鋅，鍍液處理時(shí)加入氫氧化鈉形成不溶性氫氧化物沉淀，可以除去硫酸鋁和明礬(硫酸鋁鉀)等其他成分；對(duì)于有機(jī)添加劑，可以通過加入粉狀活性炭吸附來去除。結(jié)果表明，硫酸鋁和硫酸鋁鉀不能一次完全去除，對(duì)涂層的亮度有影響，但不嚴(yán)重，可以拿出來食用。此時(shí)，涂層的亮度可以恢復(fù)。處理后，溶液可根據(jù)新工藝所需成分的含量進(jìn)行補(bǔ)充，即轉(zhuǎn)化完成。冷浸鍍鋅*適用于外管壁，而熱浸鍍鋅適用于內(nèi)、外部件。昆明40鍍鋅圓管廠家直銷</p><p style="text-indent:25px">云南鍍鋅圓管多少錢一噸，昆明鋼好物資供應(yīng)。昆明40鍍鋅圓管廠家直銷</p><p style="text-indent:25px">昆明鋼好物資有限公司是一家集加工批發(fā)于一體的大型鋼材銷售公司，常年銷售熱鍍鋅方矩管、鍍鋅扁鋼、鍍鋅角鋼、鍍鋅槽鋼、鍍鋅圓鋼、鍍鋅帶鋼、鍍鋅圓管、不銹鋼鋼板、不銹鋼角鋼、不銹鋼槽鋼、焊管、工槽角以及H型鋼。所售產(chǎn)品均符合執(zhí)行標(biāo)準(zhǔn)，適用于工程、煤礦、紡織、電力、鍋爐、機(jī)械、**等各個(gè)領(lǐng)域?，F(xiàn)已形成常年庫存周轉(zhuǎn)量10000噸以上，上千余種規(guī)格，公司以良好的信譽(yù)、質(zhì)量的產(chǎn)品、雄厚的實(shí)力、低廉的價(jià)格享譽(yù)國(guó)30多個(gè)市、自治區(qū)、縣份，產(chǎn)品深得用戶依賴。昆明40鍍鋅圓管廠家直銷</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2663810.html</p></div></div></div></div></div><div id="883qszq" class="page-right twoColRt"><div id="ramta32" class="box01 margin10 clearfix"><h3><a 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