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為什么要對不銹鋼管進行酸洗鈍化處理

日期:2021-12-27 18:58
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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;">為什么要對不銹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;">不銹鋼管的酸洗、鈍化就好比人要洗澡。不銹鋼管經焊接、熱處理、鍛造等高溫加工后,表面會產生一層氧化皮,這就要通過酸洗的方法去除。鈍化一般與酸洗聯系在一起,酸洗之后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;">那么,不銹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;">用于可放入酸洗槽或鈍化槽的零部件,但不適于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;">涂刷法</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;">適用于大型設備內處表面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;">用于安裝或檢修現場,尤其用于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;">適合于場地固定,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,對不銹鋼化學品船,可用于液貨艙內壁酸洗。</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;">用于大型設備,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系統。</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;">既可用于零部件,又可用電刷法對現場設備表面處理,技術較復雜,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,不銹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;">對制造完工后的不銹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后,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、飛濺物清理干凈,容器的機加工件表面應用汽油或清洗劑去除油漬等污物。</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,應用不銹鋼絲刷,不銹鋼鏟或砂輪**,**完畢用凈水(水中氯離子含量不超過</span>25mg/l<span style="font-family:宋體;">)沖刷干凈。</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;">當油污嚴重時則用</span>3-5%<span style="font-family:宋體;">的堿溶液將油污**,并用凈水沖洗干凈。</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;">對不銹鋼熱加工件的氧化皮可用機械噴砂的方法**,砂必須是純硅或氧化鋁。</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;">制定酸洗、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;">只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;">酸洗液酸洗主要用于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;">分鐘左右檢查一次,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于大型容器或局部處理。在室溫下將酸洗膏外均勻干凈設備上(約</span>2-3mm<span style="font-family:宋體;">厚),停留一小時后用潔凈水或不銹鋼絲刷輕輕刷,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;">鈍化液主要適用于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;">分鐘檢查一次,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,直至表面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;">鈍化膏主要適用于大型容器或局部處理,在室溫下將鈍化膏均勻涂在酸洗過的容器表面(約</span>2-3mm<span style="font-family:宋體;">),</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體;">小時后檢查,直至表面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凈水將表面沖洗干凈,*后用酸性石蕊試紙測試沖洗面的任何處,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,然后擦干或用壓縮空氣吹干。<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后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>

為什么要對不銹鋼管進行酸洗鈍化處理

西安不銹鋼管的酸洗、鈍化就好比人要洗澡。不銹鋼管經焊接、熱處理、鍛造等高溫加工后,表面會產生一層氧化皮,這就要通過酸洗的方法去除。鈍化一般與酸洗聯系在一起,酸洗之后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。

那么,不銹鋼管有哪些酸洗鈍化的方法呢?

1浸漬法

用于可放入酸洗槽或鈍化槽的零部件,但不適于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涂刷法

適用于大型設備內處表面及局部處理物工操作、勞動條件差、酸液無法回收。

3膏劑法

用于安裝或檢修現場,尤其用于焊接部處理手工操作、勞動條件差、生產成本高。

4噴淋法

適合于場地固定,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,對不銹鋼化學品船,可用于液貨艙內壁酸洗。

5循環法

用于大型設備,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系統。

6電化學法

既可用于零部件,又可用電刷法對現場設備表面處理,技術較復雜,需直流電源或恒電位儀。

當然,不銹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.對制造完工后的不銹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后,才能進行酸洗、鈍化預處理。

2.將焊縫及其兩側焊渣、飛濺物清理干凈,容器的機加工件表面應用汽油或清洗劑去除油漬等污物。

3.**焊縫兩側異物時,應用不銹鋼絲刷,不銹鋼鏟或砂輪**,**完畢用凈水(水中氯離子含量不超過25mg/l)沖刷干凈。

4.當油污嚴重時則用3-5%的堿溶液將油污**,并用凈水沖洗干凈。

5.對不銹鋼熱加工件的氧化皮可用機械噴砂的方法**,砂必須是純硅或氧化鋁。

6.制定酸洗、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

只有進行過預處理的容器或零部件才能進行酸洗鈍化處理。

酸洗液酸洗主要用于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分鐘左右檢查一次,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于大型容器或局部處理。在室溫下將酸洗膏外均勻干凈設備上(約2-3mm厚),停留一小時后用潔凈水或不銹鋼絲刷輕輕刷,直至呈現出均勻的白色酸蝕的光潔度為止。

鈍化液主要適用于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分鐘檢查一次,當溶液在21-47℃時,每小時檢查一次,直至表面生成均勻的鈍化膜為止。

鈍化膏主要適用于大型容器或局部處理,在室溫下將鈍化膏均勻涂在酸洗過的容器表面(約2-3mm),1小時后檢查,直至表面生成均勻的鈍化膜為止。

酸洗鈍化容器或零部件必須用潔凈水將表面沖洗干凈,*后用酸性石蕊試紙測試沖洗面的任何處,使PH值在6.5-7.5之間,然后擦干或用壓縮空氣吹干。容器和零部件經酸洗鈍化后搬運吊裝及存放時禁止磕碰劃傷鈍化膜。

 

 

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