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为什么要对不锈钢管进行酸洗钝化处理

日期:2021-05-09 08:05
浏览次数:0
摘要:<p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">为什么要对不锈钢管进行酸洗钝化处理</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">西安</span></span><span style="font-family:宋体;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:宋体;">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、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,这样可以有效延长设备的使用寿命。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">那么,不锈钢管有哪些酸洗钝化的方法呢?</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">浸渍法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">用于可放入酸洗槽或钝化槽的零部件,但不适于大设备酸洗液可较长时间使用,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:宋体;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:宋体;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:宋体;">涂刷法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">适用于大型设备内处表面及局部处理物工操作、劳动条件差、酸液无法回收。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">膏剂法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">用于安装或检修现场,尤其用于焊接部处理手工操作、劳动条件差、生产成本高。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">喷淋法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">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,如板材生产线上的喷淋酸洗工序,对不锈钢化学品船,可用于液货舱内壁酸洗。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">循环法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">用于大型设备,如换热器、管壳处理施工方便,酸液可回用,需配管与泵连接循环系统。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">电化学法</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">既可用于零部件,又可用电刷法对现场设备表面处理,技术较复杂,需直流电源或恒电位仪。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">当然,不锈钢管的酸洗钝化处理也有许多需要注意的地方:</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">酸洗、钝化前的预处理</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">对制造完工后的不锈钢容器或零部件按图样和工艺文件的要求,对规定项目检查合格后,才能进行酸洗、钝化预处理。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">将焊缝及其两侧焊渣、飞溅物清理干净,容器的机加工件表面应用汽油或清洗剂去除油渍等污物。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">**焊缝两侧异物时,应用不锈钢丝刷,不锈钢铲或砂轮**,**完毕用净水(水中氯离子含量不超过</span>25mg/l<span style="font-family:宋体;">)冲刷干净。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">当油污严重时则用</span>3-5%<span style="font-family:宋体;">的碱溶液将油污**,并用净水冲洗干净。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">对不锈钢热加工件的氧化皮可用机械喷砂的方法**,砂必须是纯硅或氧化铝。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;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:宋体;">制定酸洗、钝化的安全措施,确定必须的用具和劳动防护用品。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">酸洗钝化操作</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">只有进行过预处理的容器或零部件才能进行酸洗钝化处理。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">酸洗液酸洗主要用于较小型未经加工的零部件整体处理,可以用喷刷的方法。溶液温度在</span>21-60<span style="font-family:宋体;">℃时,每隔</span><span style="font-family:Calibri;">10</span><span style="font-family:宋体;">分钟左右检查一次,直至呈现出均匀的白色酸蚀的光洁度为止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">酸洗膏酸洗主要适用于大型容器或局部处理。在室温下将酸洗膏外均匀干净设备上(约</span>2-3mm<span style="font-family:宋体;">厚),停留一小时后用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为止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">钝化液主要适用于小型容器或部件整体处理,可以采用浸入或喷刷的方法,当溶液温度在</span>48-60<span style="font-family:宋体;">℃时,每</span><span style="font-family:Calibri;">20</span><span style="font-family:宋体;">分钟检查一次,当溶液在</span><span style="font-family:Calibri;">21-47</span><span style="font-family:宋体;">℃时,每小时检查一次,直至表面生成均匀的钝化膜为止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">钝化膏主要适用于大型容器或局部处理,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:宋体;">),</span><span style="font-family:Calibri;">1</span><span style="font-family:宋体;">小时后检查,直至表面生成均匀的钝化膜为止。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;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:宋体;">酸洗钝化容器或零部件必须用洁净水将表面冲洗干净,*后用酸性石蕊试纸测试冲洗面的任何处,使</span>PH<span style="font-family:宋体;">值在</span><span style="font-family:Calibri;">6.5-7.5</span><span style="font-family:宋体;">之间,然后擦干或用压缩空气吹干。<span style="font-family:宋体;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:宋体;">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:宋体;">&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:宋体;">&nbsp;</span> </p>

为什么要对不锈钢管进行酸洗钝化处理

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、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,这样可以有效延长设备的使用寿命。

那么,不锈钢管有哪些酸洗钝化的方法呢?

1浸渍法

用于可放入酸洗槽或钝化槽的零部件,但不适于大设备酸洗液可较长时间使用,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

适用于大型设备内处表面及局部处理物工操作、劳动条件差、酸液无法回收。

3膏剂法

用于安装或检修现场,尤其用于焊接部处理手工操作、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,如板材生产线上的喷淋酸洗工序,对不锈钢化学品船,可用于液货舱内壁酸洗。

5循环法

用于大型设备,如换热器、管壳处理施工方便,酸液可回用,需配管与泵连接循环系统。

6电化学法

既可用于零部件,又可用电刷法对现场设备表面处理,技术较复杂,需直流电源或恒电位仪。

当然,不锈钢管的酸洗钝化处理也有许多需要注意的地方:

酸洗、钝化前的预处理

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

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

3.**焊缝两侧异物时,应用不锈钢丝刷,不锈钢铲或砂轮**,**完毕用净水(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3-5%的碱溶液将油污**,并用净水冲洗干净。

5.对不锈钢热加工件的氧化皮可用机械喷砂的方法**,砂必须是纯硅或氧化铝。

6.制定酸洗、钝化的安全措施,确定必须的用具和劳动防护用品。

酸洗钝化操作

只有进行过预处理的容器或零部件才能进行酸洗钝化处理。

酸洗液酸洗主要用于较小型未经加工的零部件整体处理,可以用喷刷的方法。溶液温度在21-60℃时,每隔10分钟左右检查一次,直至呈现出均匀的白色酸蚀的光洁度为止。

酸洗膏酸洗主要适用于大型容器或局部处理。在室温下将酸洗膏外均匀干净设备上(约2-3mm厚),停留一小时后用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为止。

钝化液主要适用于小型容器或部件整体处理,可以采用浸入或喷刷的方法,当溶液温度在48-60℃时,每20分钟检查一次,当溶液在21-47℃时,每小时检查一次,直至表面生成均匀的钝化膜为止。

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

酸洗钝化容器或零部件必须用洁净水将表面冲洗干净,*后用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。

 

 

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