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為什麼要對不鏽鋼管進行酸洗鈍化處理

日期:2021-06-10 15:28
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摘要:<p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">為什麼要對不鏽鋼管進行酸洗鈍化處理</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">西安</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">不鏽鋼管的酸洗、鈍化就好比人要洗澡。不鏽鋼管經焊接、熱處理、鍛造等高溫加工後,表麵會產生一層氧化皮,這就要通過酸洗的方法去除。鈍化一般與酸洗聯係在一起,酸洗之後必須進行鈍化從而形成一層保護膜,這樣可以有效延長設備的使用壽命。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">那麼,不鏽鋼管有哪些酸洗鈍化的方法呢?</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">1</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">浸漬法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">用於可放入酸洗槽或鈍化槽的零部件,但不適於大設備酸洗液可較長時間使用,生產效率較高、成本低;大容積設備充滿酸液浸漬耗液太大。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">2</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">塗刷法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">適用於大型設備內處表麵及局部處理物工操作、勞動條件差、酸液無法回收。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">3</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">膏劑法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">用於安裝或檢修現場,尤其用於焊接部處理手工操作、勞動條件差、生產成本高。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">4</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">噴淋法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">適合於場地固定,封閉環境的單一產品或內部結構簡單的設備酸洗鈍化,如板材生產線上的噴淋酸洗工序,對不鏽鋼化學品船,可用於液貨艙內壁酸洗。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">5</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">循環法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">用於大型設備,如換熱器、管殼處理施工方便,酸液可回用,需配管與泵連接循環係統。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">6</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">電化學法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">既可用於零部件,又可用電刷法對現場設備表麵處理,技術較複雜,需直流電源或恒電位儀。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">當然,不鏽鋼管的酸洗鈍化處理也有許多需要注意的地方:</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">酸洗、鈍化前的預處理</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">1.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">對製造完工後的不鏽鋼容器或零部件按圖樣和工藝文件的要求,對規定項目檢查合格後,才能進行酸洗、鈍化預處理。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">2.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">將焊縫及其兩側焊渣、飛濺物清理幹淨,容器的機加工件表麵應用汽油或清洗劑去除油漬等汙物。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">3.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">**焊縫兩側異物時,應用不鏽鋼絲刷,不鏽鋼鏟或砂輪**,**完畢用淨水(水中氯離子含量不超過</span>25mg/l<span style="font-family:宋體;">)衝刷幹淨。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">4.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">當油汙嚴重時則用</span>3-5%<span style="font-family:宋體;">的堿溶液將油汙**,並用淨水衝洗幹淨。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">5.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">對不鏽鋼熱加工件的氧化皮可用機械噴砂的方法**,砂必須是純矽或氧化鋁。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">6.</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">製定酸洗、鈍化的安全措施,確定必須的用具和勞動防護用品。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">酸洗鈍化操作</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">隻有進行過預處理的容器或零部件才能進行酸洗鈍化處理。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">酸洗液酸洗主要用於較小型未經加工的零部件整體處理,可以用噴刷的方法。溶液溫度在</span>21-60<span style="font-family:宋體;">℃時,每隔</span><span style="font-family:Calibri;">10</span><span style="font-family:宋體;">分鍾左右檢查一次,直至呈現出均勻的白色酸蝕的光潔度為止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">酸洗膏酸洗主要適用於大型容器或局部處理。在室溫下將酸洗膏外均勻幹淨設備上(約</span>2-3mm<span style="font-family:宋體;">厚),停留一小時後用潔淨水或不鏽鋼絲刷輕輕刷,直至呈現出均勻的白色酸蝕的光潔度為止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">鈍化液主要適用於小型容器或部件整體處理,可以采用浸入或噴刷的方法,當溶液溫度在</span>48-60<span style="font-family:宋體;">℃時,每</span><span style="font-family:Calibri;">20</span><span style="font-family:宋體;">分鍾檢查一次,當溶液在</span><span style="font-family:Calibri;">21-47</span><span style="font-family:宋體;">℃時,每小時檢查一次,直至表麵生成均勻的鈍化膜為止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">鈍化膏主要適用於大型容器或局部處理,在室溫下將鈍化膏均勻塗在酸洗過的容器表麵(約</span>2-3mm<span style="font-family:宋體;">),</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體;">小時後檢查,直至表麵生成均勻的鈍化膜為止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">酸洗鈍化容器或零部件必須用潔淨水將表麵衝洗幹淨,*後用酸性石蕊試紙測試衝洗麵的任何處,使</span>PH<span style="font-family:宋體;">值在</span><span style="font-family:Calibri;">6.5-7.5</span><span style="font-family:宋體;">之間,然後擦幹或用壓縮空氣吹幹。<span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">容器和零部件經酸洗鈍化後搬運吊裝及存放時禁止磕碰劃傷鈍化膜。</span></span></span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體;">&nbsp;</span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體;">&nbsp;</span> </p>

為什麼要對不鏽鋼管進行酸洗鈍化處理

西安不鏽鋼管的酸洗、鈍化就好比人要洗澡。不鏽鋼管經焊接、熱處理、鍛造等高溫加工後,表麵會產生一層氧化皮,這就要通過酸洗的方法去除。鈍化一般與酸洗聯係在一起,酸洗之後必須進行鈍化從而形成一層保護膜,這樣可以有效延長設備的使用壽命。

那麼,不鏽鋼管有哪些酸洗鈍化的方法呢?

1浸漬法

用於可放入酸洗槽或鈍化槽的零部件,但不適於大設備酸洗液可較長時間使用,生產效率較高、成本低;大容積設備充滿酸液浸漬耗液太大。

2塗刷法

適用於大型設備內處表麵及局部處理物工操作、勞動條件差、酸液無法回收。

3膏劑法

用於安裝或檢修現場,尤其用於焊接部處理手工操作、勞動條件差、生產成本高。

4噴淋法

適合於場地固定,封閉環境的單一產品或內部結構簡單的設備酸洗鈍化,如板材生產線上的噴淋酸洗工序,對不鏽鋼化學品船,可用於液貨艙內壁酸洗。

5循環法

用於大型設備,如換熱器、管殼處理施工方便,酸液可回用,需配管與泵連接循環係統。

6電化學法

既可用於零部件,又可用電刷法對現場設備表麵處理,技術較複雜,需直流電源或恒電位儀。

當然,不鏽鋼管的酸洗鈍化處理也有許多需要注意的地方:

酸洗、鈍化前的預處理

1.對製造完工後的不鏽鋼容器或零部件按圖樣和工藝文件的要求,對規定項目檢查合格後,才能進行酸洗、鈍化預處理。

2.將焊縫及其兩側焊渣、飛濺物清理幹淨,容器的機加工件表麵應用汽油或清洗劑去除油漬等汙物。

3.**焊縫兩側異物時,應用不鏽鋼絲刷,不鏽鋼鏟或砂輪**,**完畢用淨水(水中氯離子含量不超過25mg/l)衝刷幹淨。

4.當油汙嚴重時則用3-5%的堿溶液將油汙**,並用淨水衝洗幹淨。

5.對不鏽鋼熱加工件的氧化皮可用機械噴砂的方法**,砂必須是純矽或氧化鋁。

6.製定酸洗、鈍化的安全措施,確定必須的用具和勞動防護用品。

酸洗鈍化操作

隻有進行過預處理的容器或零部件才能進行酸洗鈍化處理。

酸洗液酸洗主要用於較小型未經加工的零部件整體處理,可以用噴刷的方法。溶液溫度在21-60℃時,每隔10分鍾左右檢查一次,直至呈現出均勻的白色酸蝕的光潔度為止。

酸洗膏酸洗主要適用於大型容器或局部處理。在室溫下將酸洗膏外均勻幹淨設備上(約2-3mm厚),停留一小時後用潔淨水或不鏽鋼絲刷輕輕刷,直至呈現出均勻的白色酸蝕的光潔度為止。

鈍化液主要適用於小型容器或部件整體處理,可以采用浸入或噴刷的方法,當溶液溫度在48-60℃時,每20分鍾檢查一次,當溶液在21-47℃時,每小時檢查一次,直至表麵生成均勻的鈍化膜為止。

鈍化膏主要適用於大型容器或局部處理,在室溫下將鈍化膏均勻塗在酸洗過的容器表麵(約2-3mm),1小時後檢查,直至表麵生成均勻的鈍化膜為止。

酸洗鈍化容器或零部件必須用潔淨水將表麵衝洗幹淨,*後用酸性石蕊試紙測試衝洗麵的任何處,使PH值在6.5-7.5之間,然後擦幹或用壓縮空氣吹幹。容器和零部件經酸洗鈍化後搬運吊裝及存放時禁止磕碰劃傷鈍化膜。

 

 

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