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鹽霧試驗是一種主要利用鹽霧試驗設備所創造的人工模擬鹽霧環境條件來考核產品或金屬材料耐腐蝕性能的環境試驗。它分為二大類，一類為天然環境暴露試驗，另一類為人工加速模擬鹽霧環境試驗。人工模擬鹽霧環境試驗是利用一種具有一定容積空間的試驗設備——鹽霧試驗箱，在其容積空間內用人工的方法，造成鹽霧環境來對產品的耐鹽霧腐蝕性能質量進行考核。它與天然環境相比，其鹽霧環境的氯化物的鹽濃度，可以是一般天然環境鹽霧含量的幾倍或幾十倍，使腐蝕速度大大提高，對產品進行鹽霧試驗，得出結果的時間也大大縮短。如在天然暴露環境下對某產品樣品進行試驗，待其腐蝕可能要1年，而在人工模擬鹽霧環境條件下試驗，只要24小時，即可得到相似的結果。南添儀器提供鹽霧腐蝕試驗箱，能(neng)滿足各類(lei)鹽(yan)霧腐蝕(shi)試驗。若有(you)需要請魏嘉，郵箱(xiang)haoke17@163.com；QQ853803917

人工模(mo)擬鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)又包括(kuo)中(zhong)性鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)、醋(cu)酸(suan)(suan)鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)、銅(tong)鹽(yan)(yan)(yan)(yan)加(jia)速(su)(su)醋(cu)酸(suan)(suan)鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)、交變(bian)鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)。(1) 中(zhong)性鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)（NSS試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)）是(shi)(shi)出現早(zao)目前應用(yong)領域廣的一種加(jia)速(su)(su)腐(fu)(fu)(fu)蝕試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)方法。它采用(yong)5%的氯(lv)化鈉鹽(yan)(yan)(yan)(yan)水溶(rong)(rong)(rong)液(ye)(ye)(ye)，溶(rong)(rong)(rong)液(ye)(ye)(ye)PH值(zhi)(zhi)調(diao)在(zai)(zai)中(zhong)性范圍（6～7）作為噴霧(wu)用(yong)的溶(rong)(rong)(rong)液(ye)(ye)(ye)。試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)溫度(du)(du)均取35℃，要(yao)求鹽(yan)(yan)(yan)(yan)霧(wu)的沉降(jiang)(jiang)率在(zai)(zai)1～2ml/80cm².h之(zhi)間。(2) 醋(cu)酸(suan)(suan)鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)（ASS試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)）是(shi)(shi)在(zai)(zai)中(zhong)性鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)的基(ji)礎上發(fa)展起來的。它是(shi)(shi)在(zai)(zai)5%氯(lv)化鈉溶(rong)(rong)(rong)液(ye)(ye)(ye)中(zhong)加(jia)入一些冰醋(cu)酸(suan)(suan)，使溶(rong)(rong)(rong)液(ye)(ye)(ye)的PH值(zhi)(zhi)降(jiang)(jiang)為3左右(you)，溶(rong)(rong)(rong)液(ye)(ye)(ye)變(bian)成酸(suan)(suan)性，后形成的鹽(yan)(yan)(yan)(yan)霧(wu)也由中(zhong)性鹽(yan)(yan)(yan)(yan)霧(wu)變(bian)成酸(suan)(suan)性。它的腐(fu)(fu)(fu)蝕速(su)(su)度(du)(du)要(yao)比(bi)NSS試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)快3倍左右(you)。(3) 銅(tong)鹽(yan)(yan)(yan)(yan)加(jia)速(su)(su)醋(cu)酸(suan)(suan)鹽(yan)(yan)(yan)(yan)霧(wu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)（CASS試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)）是(shi)(shi)國外新近發(fa)展起來的一種快速(su)(su)鹽(yan)(yan)(yan)(yan)霧(wu)腐(fu)(fu)(fu)蝕試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)，試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)溫度(du)(du)為50℃，鹽(yan)(yan)(yan)(yan)溶(rong)(rong)(rong)液(ye)(ye)(ye)中(zhong)加(jia)入少量銅(tong)鹽(yan)(yan)(yan)(yan)—氯(lv)化銅(tong)，強(qiang)烈誘發(fa)腐(fu)(fu)(fu)蝕。它的腐(fu)(fu)(fu)蝕速(su)(su)度(du)(du)大約是(shi)(shi)NSS試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)的 8倍。

具體(ti)時間換算為(wei)：

中性鹽(yan)霧試(shi)驗(yan)(yan)24h--自然(ran)環境1年(nian)(nian)， 醋酸(suan)鹽(yan)霧試(shi)驗(yan)(yan)24h--自然(ran)環境3年(nian)(nian)， 銅鹽(yan)加(jia)速醋酸(suan)鹽(yan)霧試(shi)驗(yan)(yan)24h--自然(ran)環境8年(nian)(nian)