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為(wèi)什么要对不锈钢管进行酸洗钝化处理(lǐ)

日期:2024-04-25 08:12
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摘要:<p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">為(wèi)什么要对不锈钢管进行酸洗钝化处理(lǐ)</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">西安</span></span><span style="font-family:宋體(tǐ);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(tǐ);">不锈钢管的酸洗、钝化就好比人要洗澡。不锈钢管经焊接、热处理(lǐ)、锻造等高温加工后,表面会产生一层氧化皮,这就要通过酸洗的方法去除。钝化一般与酸洗联系在一起,酸洗之后必须进行钝化从而形成一层保护膜,这样可(kě)以有(yǒu)效延長(cháng)设备的使用(yòng)寿命。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">那么,不锈钢管有(yǒu)哪些酸洗钝化的方法呢(ne)?</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">浸渍法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">用(yòng)于可(kě)放入酸洗槽或钝化槽的零部件,但不适于大设备酸洗液可(kě)较長(cháng)时间使用(yòng),生产效率较高、成本低;大容积设备充满酸液浸渍耗液太大。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">涂刷法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">适用(yòng)于大型设备内处表面及局部处理(lǐ)物(wù)工操作、劳动条件差、酸液无法回收。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">膏剂法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">用(yòng)于安装或检修现场,尤其用(yòng)于焊接部处理(lǐ)手工操作、劳动条件差、生产成本高。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">喷淋法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">适合于场地固定,封闭环境的单一产品或内部结构简单的设备酸洗钝化,如板材生产線(xiàn)上的喷淋酸洗工序,对不锈钢化學(xué)品船,可(kě)用(yòng)于液货舱内壁酸洗。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">循环法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">用(yòng)于大型设备,如换热器、管壳处理(lǐ)施工方便,酸液可(kě)回用(yòng),需配管与泵连接循环系统。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">電(diàn)化學(xué)法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">既可(kě)用(yòng)于零部件,又(yòu)可(kě)用(yòng)電(diàn)刷法对现场设备表面处理(lǐ),技术较复杂,需直流電(diàn)源或恒電(diàn)位仪。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">当然,不锈钢管的酸洗钝化处理(lǐ)也有(yǒu)许多(duō)需要注意的地方:</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">酸洗、钝化前的预处理(lǐ)</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">对制造完工后的不锈钢容器或零部件按图样和工艺文(wén)件的要求,对规定项目检查合格后,才能(néng)进行酸洗、钝化预处理(lǐ)。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">将焊缝及其两侧焊渣、飞溅物(wù)清理(lǐ)干净,容器的机加工件表面应用(yòng)汽油或清洗剂去除油渍等污物(wù)。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">**焊缝两侧异物(wù)时,应用(yòng)不锈钢丝刷,不锈钢铲或砂轮**,**完毕用(yòng)净水(水中氯离子含量不超过</span>25mg/l<span style="font-family:宋體(tǐ);">)冲刷干净。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">当油污严重时则用(yòng)</span>3-5%<span style="font-family:宋體(tǐ);">的碱溶液将油污**,并用(yòng)净水冲洗干净。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">对不锈钢热加工件的氧化皮可(kě)用(yòng)机械喷砂的方法**,砂必须是纯硅或氧化铝。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);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(tǐ);">制定酸洗、钝化的**措施,确定必须的用(yòng)具和劳动防护用(yòng)品。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">酸洗钝化操作</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">只有(yǒu)进行过预处理(lǐ)的容器或零部件才能(néng)进行酸洗钝化处理(lǐ)。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">酸洗液酸洗主要用(yòng)于较小(xiǎo)型未经加工的零部件整體(tǐ)处理(lǐ),可(kě)以用(yòng)喷刷的方法。溶液温度在</span>21-60<span style="font-family:宋體(tǐ);">℃时,每隔</span><span style="font-family:Calibri;">10</span><span style="font-family:宋體(tǐ);">分(fēn)钟左右检查一次,直至呈现出均匀的白色酸蚀的光洁度為(wèi)止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">酸洗膏酸洗主要适用(yòng)于大型容器或局部处理(lǐ)。在室温下将酸洗膏外均匀干净设备上(约</span>2-3mm<span style="font-family:宋體(tǐ);">厚),停留一小(xiǎo)时后用(yòng)洁净水或不锈钢丝刷轻轻刷,直至呈现出均匀的白色酸蚀的光洁度為(wèi)止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">钝化液主要适用(yòng)于小(xiǎo)型容器或部件整體(tǐ)处理(lǐ),可(kě)以采用(yòng)浸入或喷刷的方法,当溶液温度在</span>48-60<span style="font-family:宋體(tǐ);">℃时,每</span><span style="font-family:Calibri;">20</span><span style="font-family:宋體(tǐ);">分(fēn)钟检查一次,当溶液在</span><span style="font-family:Calibri;">21-47</span><span style="font-family:宋體(tǐ);">℃时,每小(xiǎo)时检查一次,直至表面生成均匀的钝化膜為(wèi)止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">钝化膏主要适用(yòng)于大型容器或局部处理(lǐ),在室温下将钝化膏均匀涂在酸洗过的容器表面(约</span>2-3mm<span style="font-family:宋體(tǐ);">),</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體(tǐ);">小(xiǎo)时后检查,直至表面生成均匀的钝化膜為(wèi)止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">酸洗钝化容器或零部件必须用(yòng)洁净水将表面冲洗干净,*后用(yòng)酸性石蕊试纸测试冲洗面的任何处,使</span>PH<span style="font-family:宋體(tǐ);">值在</span><span style="font-family:Calibri;">6.5-7.5</span><span style="font-family:宋體(tǐ);">之间,然后擦干或用(yòng)压缩空气吹干。<span style="font-family:宋體(tǐ);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(tǐ);">容器和零部件经酸洗钝化后搬运吊装及存放时禁止磕碰划伤钝化膜。</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(tǐ);">&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(tǐ);">&nbsp;</span> </p>

為(wèi)什么要对不锈钢管进行酸洗钝化处理(lǐ)

西安不锈钢管的酸洗、钝化就好比人要洗澡。不锈钢管经焊接、热处理(lǐ)、锻造等高温加工后,表面会产生一层氧化皮,这就要通过酸洗的方法去除。钝化一般与酸洗联系在一起,酸洗之后必须进行钝化从而形成一层保护膜,这样可(kě)以有(yǒu)效延長(cháng)设备的使用(yòng)寿命。

那么,不锈钢管有(yǒu)哪些酸洗钝化的方法呢(ne)?

1浸渍法

用(yòng)于可(kě)放入酸洗槽或钝化槽的零部件,但不适于大设备酸洗液可(kě)较長(cháng)时间使用(yòng),生产效率较高、成本低;大容积设备充满酸液浸渍耗液太大。

2涂刷法

适用(yòng)于大型设备内处表面及局部处理(lǐ)物(wù)工操作、劳动条件差、酸液无法回收。

3膏剂法

用(yòng)于安装或检修现场,尤其用(yòng)于焊接部处理(lǐ)手工操作、劳动条件差、生产成本高。

4喷淋法

适合于场地固定,封闭环境的单一产品或内部结构简单的设备酸洗钝化,如板材生产線(xiàn)上的喷淋酸洗工序,对不锈钢化學(xué)品船,可(kě)用(yòng)于液货舱内壁酸洗。

5循环法

用(yòng)于大型设备,如换热器、管壳处理(lǐ)施工方便,酸液可(kě)回用(yòng),需配管与泵连接循环系统。

6電(diàn)化學(xué)法

既可(kě)用(yòng)于零部件,又(yòu)可(kě)用(yòng)電(diàn)刷法对现场设备表面处理(lǐ),技术较复杂,需直流電(diàn)源或恒電(diàn)位仪。

当然,不锈钢管的酸洗钝化处理(lǐ)也有(yǒu)许多(duō)需要注意的地方:

酸洗、钝化前的预处理(lǐ)

1.对制造完工后的不锈钢容器或零部件按图样和工艺文(wén)件的要求,对规定项目检查合格后,才能(néng)进行酸洗、钝化预处理(lǐ)。

2.将焊缝及其两侧焊渣、飞溅物(wù)清理(lǐ)干净,容器的机加工件表面应用(yòng)汽油或清洗剂去除油渍等污物(wù)。

3.**焊缝两侧异物(wù)时,应用(yòng)不锈钢丝刷,不锈钢铲或砂轮**,**完毕用(yòng)净水(水中氯离子含量不超过25mg/l)冲刷干净。

4.当油污严重时则用(yòng)3-5%的碱溶液将油污**,并用(yòng)净水冲洗干净。

5.对不锈钢热加工件的氧化皮可(kě)用(yòng)机械喷砂的方法**,砂必须是纯硅或氧化铝。

6.制定酸洗、钝化的**措施,确定必须的用(yòng)具和劳动防护用(yòng)品。

酸洗钝化操作

只有(yǒu)进行过预处理(lǐ)的容器或零部件才能(néng)进行酸洗钝化处理(lǐ)。

酸洗液酸洗主要用(yòng)于较小(xiǎo)型未经加工的零部件整體(tǐ)处理(lǐ),可(kě)以用(yòng)喷刷的方法。溶液温度在21-60℃时,每隔10分(fēn)钟左右检查一次,直至呈现出均匀的白色酸蚀的光洁度為(wèi)止。

酸洗膏酸洗主要适用(yòng)于大型容器或局部处理(lǐ)。在室温下将酸洗膏外均匀干净设备上(约2-3mm厚),停留一小(xiǎo)时后用(yòng)洁净水或不锈钢丝刷轻轻刷,直至呈现出均匀的白色酸蚀的光洁度為(wèi)止。

钝化液主要适用(yòng)于小(xiǎo)型容器或部件整體(tǐ)处理(lǐ),可(kě)以采用(yòng)浸入或喷刷的方法,当溶液温度在48-60℃时,每20分(fēn)钟检查一次,当溶液在21-47℃时,每小(xiǎo)时检查一次,直至表面生成均匀的钝化膜為(wèi)止。

钝化膏主要适用(yòng)于大型容器或局部处理(lǐ),在室温下将钝化膏均匀涂在酸洗过的容器表面(约2-3mm),1小(xiǎo)时后检查,直至表面生成均匀的钝化膜為(wèi)止。

酸洗钝化容器或零部件必须用(yòng)洁净水将表面冲洗干净,*后用(yòng)酸性石蕊试纸测试冲洗面的任何处,使PH值在6.5-7.5之间,然后擦干或用(yòng)压缩空气吹干。容器和零部件经酸洗钝化后搬运吊装及存放时禁止磕碰划伤钝化膜。