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鹽霧測(cè)試就是一種人造氣氛的加速抗腐蝕評(píng)估方法。它是將一定濃度的鹽水霧化；然后噴在一個(gè)密閉的恒溫箱內(nèi)，通過(guò)觀察被測(cè)樣品在箱內(nèi)放置一段時(shí)間后的變化來(lái)反映被測(cè)樣品的抗腐蝕性，它是一種加速測(cè)試方法，其鹽霧環(huán)境的氯化物的鹽濃度，可是一般天然環(huán)境鹽霧含量的幾倍或幾十倍，使腐蝕速度大幅提高，對(duì)產(chǎn)品進(jìn)行鹽霧試驗(yàn)，得出結(jié)果的時(shí)間也大幅縮短。 </p> <p> <br /> </p> <p> <br /> </p> <p> 在天然環(huán)境下對(duì)某產(chǎn)品樣品進(jìn)行試驗(yàn)，腐蝕時(shí)間可能需要一年甚至數(shù)年，河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家，河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家，而在人工模擬鹽霧環(huán)境條件下試驗(yàn)，河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家，只要數(shù)天甚至是數(shù)小時(shí)，即可得到相似的結(jié)果。 </p> <p> <br /> </p> <p> <p> 鹽霧試驗(yàn)主要分為4種： </p> <p> <br /> </p> <p> 中性鹽霧試驗(yàn)（NSS）; </p> <p> <br /> </p> <p> 乙酸鹽霧試驗(yàn)（AASS）； </p> <p> 銅加速乙酸鹽霧試驗(yàn)（CASS）; </p> <p> 交變鹽霧試驗(yàn)。 </p> 沙塵測(cè)試箱廠家哪家好？河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家,測(cè)試箱" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/hbgtsy/2019/12/637122756428512167/6371227564285121678254723.jpg"></div><p> 人工模擬鹽霧試驗(yàn)又包括中性鹽霧試驗(yàn)、醋酸鹽霧試驗(yàn)、銅鹽加速醋酸鹽霧試驗(yàn)、交變鹽霧試驗(yàn)。1、中性鹽霧試驗(yàn)(NSS試驗(yàn))是出現(xiàn)**早目前應(yīng)用領(lǐng)域**廣的一種加速腐蝕試驗(yàn)方法。它采用5%的氯化鈉鹽水溶液，溶液PH值調(diào)在中性范圍(6～7)作為噴霧用的溶液。試驗(yàn)溫度均取35℃，要求鹽霧的沉降率在1～2ml/。2、醋酸鹽霧試驗(yàn)(ASS試驗(yàn))是在中性鹽霧試驗(yàn)的基礎(chǔ)上發(fā)展起來(lái)的。它是在5%氯化鈉溶液中加入一些冰醋酸，使溶液的PH值降為3左右，溶液變成酸性，***形成的鹽霧也由中性鹽霧變成酸性。它的腐蝕速度要比NSS試驗(yàn)**倍左右。3、銅鹽加速醋酸鹽霧試驗(yàn)(CASS試驗(yàn))是國(guó)外新近發(fā)展起來(lái)的一種快速鹽霧腐蝕試驗(yàn)，試驗(yàn)溫度為50℃，鹽溶液中加入少量銅鹽—氯化銅，強(qiáng)烈誘發(fā)腐蝕。它的腐蝕速度大約是NSS試驗(yàn)的8倍。4、交變鹽霧試驗(yàn)是一種綜合鹽霧試驗(yàn)，它實(shí)際上是中性鹽霧試驗(yàn)加恒定濕熱試驗(yàn)。它主要用于空腔型的整機(jī)產(chǎn)品，通過(guò)潮態(tài)環(huán)境的滲透，使鹽霧腐蝕不但在產(chǎn)品表面產(chǎn)生，也在產(chǎn)品內(nèi)部產(chǎn)生。它是將產(chǎn)品在鹽霧和濕熱兩種環(huán)境條件下交替轉(zhuǎn)換，***考核整機(jī)產(chǎn)品的電性能和機(jī)械性能有無(wú)變化。河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家武漢高低溫測(cè)試箱品牌有哪些？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家,測(cè)試箱" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/hbgtsy/2019/12/637122757613820330/6371227576138203302898569.jpg"></div><p> 砂塵試驗(yàn)箱主要用于外殼防護(hù)等級(jí)標(biāo)準(zhǔn)中規(guī)定的IP5X和IP6X兩個(gè)等級(jí)的試驗(yàn)。采用人工模擬砂塵環(huán)境來(lái)檢驗(yàn)試件防塵能力的試驗(yàn)設(shè)備，那么有客戶就會(huì)問(wèn)了，新購(gòu)的砂塵試驗(yàn)箱除了了解它的使用和保養(yǎng)之外，對(duì)設(shè)備的放置場(chǎng)地有沒(méi)有什么要求呢? </p> <p> 砂塵試驗(yàn)箱場(chǎng)地放置條件需滿足以下要求： </p> <p> 1、避免潮濕、陽(yáng)光直射、灰塵較多等環(huán)境。 </p> <p> 2、四周應(yīng)留出80公分的空間，不可緊貼墻壁或其他試驗(yàn)設(shè)備。 </p> <p> 3、為了設(shè)備的穩(wěn)定性，環(huán)境溫濕度應(yīng)保持在：溫度5℃～30℃、濕度≤85%R.H。 </p> <p> 4、避免凹凸不平等現(xiàn)象，應(yīng)安裝在水平的地面。 </p> <p> 5、安裝場(chǎng)地應(yīng)通風(fēng)良好，四周便于操作。 </p><p> 鹽霧試驗(yàn)箱可做試驗(yàn)方法有：中性鹽霧試驗(yàn)(NSS試驗(yàn))、乙酸鹽霧試驗(yàn)（AASS）、銅加速乙酸鹽霧試驗(yàn)（CASS），不同的鹽霧試驗(yàn)對(duì)鹽霧試驗(yàn)箱材質(zhì)有著不用的要求。玻璃鋼材質(zhì)：玻璃纖維或其制品作增強(qiáng)材料的增強(qiáng)塑料，稱謂為玻璃纖維增強(qiáng)塑料，或稱謂玻璃鋼。玻璃鋼殼體比較高溫度50℃，長(zhǎng)時(shí)間做高溫試驗(yàn)易使箱體老化，漏水后無(wú)法修補(bǔ)。因此，很快被PVC板多代替。PVC增強(qiáng)硬質(zhì)塑料板：具有耐腐蝕的優(yōu)點(diǎn)，可做中性鹽霧試驗(yàn)，可以滿足一般鹽霧試驗(yàn)。但是，隨著試驗(yàn)要求的愈加嚴(yán)苛。許多客戶需做酸性鹽霧試驗(yàn)和銅加速醋本能試驗(yàn)（即CASS試驗(yàn)）要求廠家整改，這樣的方式代價(jià)又太高。因此，PVC板材的鹽霧試驗(yàn)箱被PP板替代。PP板：PP板相對(duì)于PVC板的鹽霧試驗(yàn)箱可以耐更高的溫度。pvc板鹽霧：箱體溫度35℃，空氣飽和桶47℃；PP板鹽霧：箱體溫度50℃，空氣飽和桶63℃。前者材質(zhì)若做酸性鹽霧試驗(yàn)，時(shí)間一久勢(shì)必會(huì)是試驗(yàn)箱箱體變形。而后者材質(zhì)不會(huì)，具有試驗(yàn)范圍更加***的優(yōu)點(diǎn)，可做中性鹽霧試驗(yàn)(NSS試驗(yàn))、乙酸鹽霧試驗(yàn)（AASS）、銅加速乙酸鹽霧試驗(yàn)等多種試驗(yàn)。PP板材質(zhì)的鹽霧試驗(yàn)箱是您的***選擇，一箱多用，經(jīng)久耐用。一臺(tái)鹽霧試驗(yàn)箱能為您提供多少價(jià)值？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家,測(cè)試箱" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/hbgtsy/2019/12/637122757923627028/6371227579236270282341129.jpg"></div><p> 鹽霧測(cè)試是一種主要利用鹽霧試驗(yàn)設(shè)備所創(chuàng)造的人工模擬鹽霧環(huán)境條件來(lái)考核產(chǎn)品或金屬材料耐腐蝕性能的環(huán)境試驗(yàn)。它分為兩大類，一類為天然環(huán)境暴露試驗(yàn)，另一類為人工加速模擬鹽霧環(huán)境試驗(yàn)。人工模擬鹽霧環(huán)境試驗(yàn)是利用一種具有一定容積空間的試驗(yàn)設(shè)備——鹽霧試驗(yàn)箱，在其容積空間內(nèi)用人工的方法，造成鹽霧環(huán)境來(lái)對(duì)產(chǎn)品的耐鹽霧腐蝕性能質(zhì)量進(jìn)行考核。 </p> <p> 腐蝕是材料或其性能在環(huán)境的作用下引起的破壞或變質(zhì)。大多數(shù)的腐蝕發(fā)生在大氣環(huán)境中，大氣中含有氧氣、濕度、溫度變化和污染物等腐蝕成分和腐蝕因素。鹽霧腐蝕就是一種常見(jiàn)和**有破壞性的大氣腐蝕。鹽霧對(duì)金屬材料表面的腐蝕是由于含有的氯離子穿透金屬表面的氧化層和防護(hù)層與內(nèi)部金屬發(fā)生電化學(xué)反應(yīng)引起的。同時(shí)，氯離子含有一定的水合能，易被吸附在金屬表面的孔隙、裂縫排擠并取代氧化層中的氧，把不溶性的氧化物變成可溶性的氯化物，使鈍化態(tài)表面變成活潑表面。耐腐蝕鹽霧試驗(yàn)箱價(jià)格。河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家</p><p style="text-indent:25px">鹽霧試驗(yàn)結(jié)果的判定方法有：評(píng)級(jí)判定法、稱重判定法、腐蝕物出現(xiàn)判定法、腐蝕數(shù)據(jù)統(tǒng)計(jì)分析法。河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家</p><p> 在實(shí)驗(yàn)工作中，必須要想盡一切辦法，比較大限度地消除或減小鹽霧試驗(yàn)箱可能存在的系統(tǒng)誤差，或者對(duì)試驗(yàn)結(jié)果進(jìn)行修正。發(fā)現(xiàn)系統(tǒng)誤差需要改變實(shí)驗(yàn)條件和實(shí)驗(yàn)方法，反復(fù)進(jìn)行對(duì)比，系統(tǒng)誤差的消除或減小是比較復(fù)雜的問(wèn)題，沒(méi)有固定不變的方法，要具體問(wèn)題具體分析，各個(gè)修正。產(chǎn)生系統(tǒng)誤差的原因可能不止一個(gè)，一般應(yīng)找出影響的主要因素，有針對(duì)性地消除可減小誤差。以下介紹幾種常用的方法：1、檢定修正法：將儀器送計(jì)量部門檢驗(yàn)，取得修正值，以便對(duì)某一被測(cè)量數(shù)據(jù)進(jìn)行修正。2、替代法：在實(shí)驗(yàn)條件不變的情況下，用一個(gè)已知標(biāo)準(zhǔn)量替換被測(cè)量結(jié)果來(lái)減小系統(tǒng)誤差。3、異號(hào)法：對(duì)實(shí)驗(yàn)時(shí)在兩次不同測(cè)試條件中出現(xiàn)符號(hào)相反的誤差，采用取兩次誤差平均值作為測(cè)試結(jié)果。通過(guò)以上方法，我們?cè)谟名}霧試驗(yàn)箱進(jìn)行實(shí)驗(yàn)工作時(shí)，就能有效地排除系統(tǒng)誤差存在的可能，使得實(shí)驗(yàn)結(jié)果接近實(shí)際需要。河南標(biāo)準(zhǔn)型號(hào)耐腐蝕測(cè)試箱廠家</p><p style="text-indent:25px">湖北高天試驗(yàn)設(shè)備有限公司創(chuàng)辦于2011-10-17，是一家生產(chǎn)型的公司。經(jīng)過(guò)多年不斷的歷練探索和創(chuàng)新發(fā)展，公司致力于為客戶提供安全、質(zhì)量有保障的質(zhì)量產(chǎn)品及服務(wù)，是一家有限責(zé)任公司（自然）企業(yè)。公司業(yè)務(wù)涵蓋[ "高低溫試驗(yàn)箱", "恒溫恒濕試驗(yàn)箱", "冷熱沖擊試驗(yàn)箱", "鹽霧試驗(yàn)箱" ]，價(jià)格合理，品質(zhì)有保證，深受廣大客戶的歡迎。高天試驗(yàn)設(shè)備供應(yīng)將以真誠(chéng)的服務(wù)、創(chuàng)新的理念、***的產(chǎn)品，為彼此贏得全新的未來(lái)！</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/736960.html</p></div></div></div></div></div><div id="cykn3nk" class="page-right twoColRt"><div id="7npmd7t" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2ri3pcz" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="0spm2su" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" 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