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valign="top">【文章導(dǎo)讀：】關(guān)注盛通不銹鋼焊管廠家，實(shí)時(shí)為你分享不銹鋼行業(yè)資訊。盛通不銹鋼焊管廠家，你身邊的采購(gòu)顧問，今天為你淺析一下如何識(shí)別不銹鋼焊管的真?zhèn)危?span style="font-size: 14px;"></span></td></tr></tbody></table><p> 做為一家制管的廠家，12年生產(chǎn)經(jīng)驗(yàn)的累積，為你淺析一下如何識(shí)別不銹鋼焊管的真?zhèn)危?br/><br/> <img style="width: 580px; height: 175px;" alt="不銹鋼焊管" src="/UploadFiles/FCK/2016-08/6360623785184375008995309.jpg" title="不銹鋼焊管" width="580" vspace="0" hspace="0" height="175" border="0"/><br/><br/>　　一、磁性試驗(yàn)磁性試驗(yàn)是區(qū)別退火奧氏體<a href="/product/" class='con_kwd'>不銹鋼焊管</a>與鐵素體不銹鋼的簡(jiǎn)單的方法。奧氏體不銹鋼是非磁性鋼，但經(jīng)大壓下冷加工后將具有輕度的磁性；而純粹的鉻鋼和低合金鋼都是強(qiáng)磁性鋼。<br/>　　二、硝酸點(diǎn)試驗(yàn)不銹鋼焊管的一個(gè)特點(diǎn)是對(duì)濃硝酸和稀硝酸具有固有的耐蝕性。這種性能使其能很容易地從大多數(shù)其他金屬或合金中加以區(qū)分。但高碳型420和440鋼在進(jìn)行硝酸點(diǎn)試驗(yàn)時(shí)則稍受腐蝕，有色金屬遇到濃硝酸時(shí)立即會(huì)被腐蝕。而稀硝酸對(duì)碳鋼具有強(qiáng)烈的腐蝕性。<br/><br/> <img src="/UploadFiles/FCK/2016-08/6360623789585937504947145.jpg" title="不銹鋼焊管廠"/><br/><br/>　　三、硫酸銅點(diǎn)試驗(yàn)硫酸銅點(diǎn)試驗(yàn)是快速區(qū)分普通碳素鋼和所有類型的不銹鋼焊管的簡(jiǎn)便方法。所使用的硫酸銅溶液的濃度為5~10％。在進(jìn)行點(diǎn)試驗(yàn)前，試驗(yàn)區(qū)應(yīng)徹底清除油脂或各種雜質(zhì)，并用軟磨布磨光一個(gè)小區(qū)域，然后再用滴瓶向清理后的區(qū)域滴注硫酸銅溶液。普通碳素鋼或鐵在幾秒鐘內(nèi)就會(huì)形成一層表面金屬銅，而不銹鋼的表面則不產(chǎn)生銅沉淀或顯示銅的顏色。四、硫酸試驗(yàn)硫酸浸沒不銹鋼管試驗(yàn)?zāi)馨?02和304與316和317區(qū)分開來。試樣的切邊應(yīng)經(jīng)過細(xì)磨，然后在體積濃度為20~30％、201不銹鋼管溫度為60~66℃的硝酸（比重為1.42）中清洗和鈍化半小時(shí)。硫酸試驗(yàn)溶液的體積濃度為10％，加熱到71℃當(dāng).302和304鋼浸入這種熱溶液中時(shí)，被迅速腐蝕并產(chǎn)生大量氣泡，試樣在幾分鐘內(nèi)變黑；而316和317鋼的試樣則不受腐蝕或反應(yīng)很慢（不產(chǎn)生氣泡），試樣在10~15分鐘內(nèi)不變色。如果采用同時(shí)試驗(yàn)具有已知成分的試樣來進(jìn)行近似比較的話，可使試驗(yàn)更為準(zhǔn)確。<br/><br/> <img style="width: 580px; height: 443px;" alt="不銹鋼焊接管" src="/UploadFiles/FCK/2016-08/6360623794265625004383998.gif" title="不銹鋼焊接管" width="580" vspace="0" hspace="0" height="443" border="0"/><br/>　　<br/> 看到這里，你是否知道如何識(shí)別不銹鋼焊管的真?zhèn)瘟四兀筷P(guān)注盛通不銹鋼焊管廠家，實(shí)時(shí)為你分享不銹鋼行業(yè)資訊。盛通不銹鋼焊管廠家，你身邊的采購(gòu)顧問。<br/> <br/></p><p><img 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