镀锌件如何打字

㈠ 镀锌板点焊机焊接时需要注意哪些事项

镀锌板点焊机常识性的操作技巧及注意事项大多都是随看随忘，但是生产内安全又高于一切，容所以我们一定要多注意遵守安全生产规范。下面再来说一下镀锌板点焊机的正确使用及焊接完之后的注意事项。

一、焊接注意事项 1、要调节好电极杆的位置后再进行焊接，电极要恰好能够压到焊件； 2、先接通冷却水，然后再接通电源，就可以准备进行焊接了，焊件应置于电极之间； 3、在镀锌板点焊机焊接前，要对焊件进行清洁，焊接处不能有脏污、氧化皮等，否则会影响焊机焊接质量和使用寿命；
4、焊接时的参数，比如焊接电流，应根据焊件的情况来定，金属导电率越高，则焊接电流密度越大，所以焊机焊接时间要缩短。这方面也是需要我们注意的，不能掉以轻心。

二、焊接完注意事项 1、焊机停止工作，应先切断电源、气源，最后关闭水源，清除杂物和焊渣溅末。 2、镀锌板点焊机长期停用，应在不涂漆的活动部位涂上防锈油指。每月通电加热30min。更换闸流管亦应预热30min，正常工作控制箱的预热不少于5min。

㈡ A3材料零件镀锌在图纸上怎样标注

A3材料零件镀锌的图纸标注方法有多种，最多最普遍的标注方法就是在技术要求栏中标注，注明方法是 表面处理:镀锌

㈢ 什么是机械镀锌

机械镀锌是一种与电镀锌、热镀锌铁、达克罗处理不同工艺过程的防腐镀层。

1、机械镀锌主要式艺过程：

（1）、零件前处理、除油、除锈（可线下处理）→水洗→闪镀置换铜→水洗→机械镀锌沉积过渡底层→机械镀锌沉积→水抛光→零件倒出分离→热水洗（或按要求零件表面铬钝化、浸相关保护层）→甩干并烘干→检测验收。

（2）、零件前处理、除油、除锈对普通件，可按表面处理常规方法，但对高强钢基体零件的除锈、除氧化皮，尤为注意，因为不能较长时间采用含氢离子的强酸性化学材料对零件表面进行除锈及除氧皮，这样处理会对零件钢基产生一定渗氢影响，所以，应采用机械法来解决：如喷沙、振动光饰、抛丸工艺等。

（3）、闪镀置换铜：

置换铜层无厚度要求，但要完全覆盖零件基体表面，它的作用是：提高镀层结合力、有利于镀层表面状况的均匀性、阻挡工艺过程产生的氢对基体的渗入。

（4）、机械镀锌沉积过渡底层：

这一工序是针对置换铜层而言，实施步骤是定量的机械镀锌专用引发剂和少量的渡覆锌粉加入滚动的渡筒内，滚动3—5min就可以形成使原来零件基本的铜层转变为银灰色的复合镀锌层。该镀锌层质量的优劣将影响后续加厚渡层的韧性与渡层结合力。

（5）、机械镀锌沉积：

定量分批次加入沉锌引发剂、渡层厚度要求韵锌粉可在15cm—30min定成此工序，达到工业零件要求的防腐镀锌层厚度。

㈣ 镀锌管的生产工艺

黑件检查→挂料→脱脂→漂洗→酸洗→清洗→浸渍助镀剂→热空气烘干→热浸镀锌→专内外属吹→冷却→钝化和漂洗→卸料→检验、修整→打字标识→包装入库、运输。
镀锌带→开卷→拉伸→卷管→焊接→刮疤→钝化和漂洗→补锌→定型→打字标识→裁剪→打包→烘干→过磅。

㈤ 镀锌管上打字打不直是怎么回事

镀锌钢管并不能直接弯曲90度。 弯头的工作流程方法一般是热推成型和冲压成型，这两种方法可以很好的工件弯曲，但是镀锌的工件因为淬火之后硬度极大升高，并不能够弯曲，否则会使得工件发生折断。 正确的处理方法是先将工件弯曲然后再镀锌，这样...

㈥ 钢件产品镀锌后激光打字有没有影响表面的防腐蚀效果

而采用镀锌层与油漆涂料联合保护的方法，才是更积极有效的防腐蚀办法。同时采用油漆涂料，能使镀锌件取得更加丰富的颜色和良好的表面效果。镀锌钢材涂漆前的表面处理1、镀锌层在大气环境中经过曝晒后表面会形成锌盐（又称白锈），在涂装油漆之前这些锌盐必须彻底除尽。最有效的处理方法是轻扫喷砂方法；如果不可能使用喷砂处理，可以使用钢丝刷或钢丝绒和充分的淡水，以机械清理和冲洗的办法除尽锌盐。2、未经曝晒的镀锌钢材或镀锌铁皮（又称白铁皮）的表面往往沾有油污或防锈油，必须先以溶剂或洗涤剂除去这些油污后，再采用上述的表面处理方法。通常选用底漆稀释剂将表面擦拭干净。需要强调指出的是，涂装在以钢丝刷处理表面的油漆涂层的耐久性比喷砂处理表面上的涂层要差得多。镀锌钢材油漆配套1、用于浸水或潮湿环境中的镀锌钢材上的油漆配套体系必须是耐碱性好和不能被皂化的，因此以选用环氧型涂料为宜。以环氧锌黄底漆最佳。2、对于曝晒在干燥大气环境下的镀锌钢材，可选用环氧锌黄底漆加丙烯酸聚氨酯面漆，或者环氧锌黄底漆+环氧云铁中间漆+氟碳面漆的超耐候，超长使用年限的配套方案。总之，表面处理非常重要，考虑到镀锌部件的耐久性，建议选用以上两种配套油漆，以保证正常的使用年限，减少中间维护费用。以上为紫禁漆业为您的镀锌钢材表面涂漆的表面处理方式及油漆配套方案，更详细的产品价格及配套请致电紫禁城漆业。

㈦ 镀锌管配件名称

镀锌线管的配件有：
1.有灯头盒、接线盒、开关盒、插座盒、直管接头、螺纹管接头、护口、管卡、园钢、扁钢、角钢、防锈漆等，螺栓、螺母、垫圈为镀锌件等。

㈧ 关于镀锌件焊接

关于镀锌件焊接：

1、镀锌件如何有效的焊悄薯扮接一直困扰着工程技术人员，因为锌的熔点约为420摄氏度手历，挥发温度约为90摄氏度，普通熔焊的高温电弧约3000至4000摄氏度，必然促使大量的锌蒸发，从而导致各种焊接缺陷，并破坏了锌层的抗腐蚀功能。

2、普通的冷镀锌件，镀锌层比较薄，可以使用普通的电焊或者气保焊接，焊接前将镀锌件表面的镀锌层做打磨处理后焊接。

3、若是不便于打磨但是需要带镀锌层焊接，就需要用气体保护焊接，采用50杠6的启灶焊丝焊接。但是这种方法锌烧损比较严重，采用威欧丁上双脉冲的熔化极惰性气体保护焊可以缓解锌烧损现象。

4、如果是热镀锌，镀锌层偏厚的情况下用WE53的焊条氩弧焊焊接。

5、普通的电弧焊焊接镀锌件时会产生大量的白色氧化锌烟尘，会损伤体力和健康。因此在焊接镀锌件时，必须加强通风除尘措施，必要时应佩戴防尘口罩。

㈨ 专业文章翻译：热浸镀锌层涂装前表面处理

Preparing Hot Dip Galvanizing for Painting – It’s not Overly Complicated

热浸镀锌层涂装前表面处理-这并不太复杂

文章来自防腐涂装良心网站KTAuniversity，原文链接  请点这里

Bare galvanizing provides excellent corrosion protection at a pH between 7 and 13, but corrosion of the zinc increases as the pH becomes more acidic (less than 7), or more alkaline (greater than 13).  When galvanizing is exposed to the lower or higher pH ranges, it should be painted.  Paint should also be applied when aesthetics is important, regardless of pH.  Unfortunately, when galvanizing is painted, paint failures can occur (Photo 1), but they are easy to prevent through proper surface preparation.

在 ph 值为7和13的情况下, 仅凭镀锌就可以提供优异的腐蚀保护, 但锌的腐蚀会稿侍随着 ph 值变酸性 (小于 7) 或碱性 (大于 13) 而提高。 当镀锌层暴露在更低或更高的 pH 值范围内时, 应当进行涂装。 当外观比较重要时, 无论 pH 值如何, 也应该涂装。 不幸的是, 对镀锌表面涂装时, 很可能发生涂层失效 (照片 1), 但通过适当的表面处理这很容坦斗易防止。

Photo 1 – Typical failure of paint to galvanizing e to lack of surface preparation.

照片 1-由于缺乏表面处理造成的典型涂层失效。

Surface preparation is the key to assuring successful coating adhesion and performance.  The extent of preparation required depends on the answers to these four questions:

Was the galvanizing passivated?

Is the galvanizing new?

Is the galvanizing partially weathered?

Is the galvanizing aged?

表面处理是保证涂层附着力和性能的关键。所需处理的程度取决于对以下四个问题的回答:

镀锌键信吵层钝化处理了吗？

镀锌层是新的吗？

镀锌层是否部分风化？

镀锌层是否老化？

Passivating Treatments – Passivation is a common practice used at the time of galvanizing to rece the formation of white storage stain.  Unfortunately, passivating treatments applied to galvanizing (especially chromate treatments) can interfere with the adhesion of coatings.  If the galvanized steel is going to be painted, the galvanizer should be notified in advance, so that the passivation step can be eliminated.  Frequently, however, parts have already been galvanized and the user does not know whether a treatment was applied.  When in doubt, the surface should be tested.  A suitable procere is provided in SSPC-SP16, Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals.”  Section 4.3.3 of the standard offers the following:

钝化处理  – 钝化是镀锌时常用的一种方法，以减少镀锌件储存时白锈印迹的形成。不幸的是，对镀锌件的钝化处理(特别是铬酸盐处理)会影响涂层的附着力。如果镀锌件要涂装，应提前通知镀锌人员，以便取消钝化步骤。然而，实际情况通常是部件已经镀锌完成但用户不知道是否进行了钝化处理。如有疑问，应对表面进行测试。SSPC - SP16中提供了一个合适的程序，即“涂装和未涂装镀锌件、不锈钢和有色金属表面的扫砂处理标准。” 该标准第4.3.3节规定如下：

If all three areas turn black immediately, there is no passivation on the surface. If the first area does not turn black within 10 seconds and the second and third areas turn black immediately, there is no passivation on the surface with the possible exception of light oil. If the first and second areas do not turn black within 10 seconds and the third area turns immediately, a passivator of some type is present.

If it is present, mechanical cleaning is typically required to remove it, although some of the etching/cleaning solutions discussed below suggest that they will also remove some treatments.  Before using them, it is recommended that the etching cleaner be applied to discrete areas followed by the testing described above to determine if the treatment is removed.  If the project schele permits, weathering of 12 to 18 months prior to painting, should also eliminate any treatment that may have been present.

如果3个区域均立刻变黑，则表面没有钝化处理。如果第1个区域没有在10秒内变黑，而第2和第3区域立即变黑，则表面没有钝化处理，但可能有轻微的油渍存在。如果第1和第2区域没有在10秒内变黑，而第3区域立即变黑，则表面有过钝化处理。

如果检测有过钝化处理，则通常需要机械工具来清理，尽管后面提到的一些蚀刻/清洗液也能去除某些钝化层。如果使用蚀刻清洗液，建议先在小块区域试验，随后进行上述测试，以确定是否去除了钝化层。如果项目进度允许，涂装前风化了12至18个月的构件也应去除可能存在的钝化层。

New and Partially Weathered Galvanizing – If the age of the galvanizing is less than approximately 48 hours, it may be possible to coat it as is, but if it is weathered between a couple days and approximately one year (termed partially weathered), surface preparation will be required.  Two methods that are commonly used to prepare the galvanizing are cleaning/etching with a phosphoric acid/detergent blend and abrasive blast cleaning.

Etching solutions are used to clean, ll, and roughen the surface for proper coating adhesion.  The solution is applied to the surface, typically scrubbed with a synthetic abrasive pad, thoroughly rinsed, and force dried.  Examples of solutions can be found in the Master Painters Institute (MPI) qualified procts list #25, Cleaner, Etching, for Galvanized Metal ( http://www.specifypaint.com/APL/paintinfo_APL_new/MpiNumber.asp?ID=25000 ).

新的和部分风化的镀锌层 –    如果镀锌时间小于约48小时，可以直接涂装，但如果镀锌层经过在几天至约一年之间的风化(称为部分风化)，则需要进行表面处理。通常用于镀锌件的两种表面处理方法是喷砂清理和用磷酸/洗涤剂混合物进行清理/蚀刻。

蚀刻清洗液用于表面清理、表面暗化和粗糙化以获得适当的涂层附着力。将溶液施加到表面上，通常用合成研磨片研磨，彻底冲洗，并烘干干燥。溶液种类可在“Master Painters Institute ( MPI )”认证产品列表#25“镀锌金属的蚀刻清洗液”中找到。( http://www.specifypaint.com/APL/paintinfo_APL_new/MpiNumber.asp?ID=25000 )

Abrasive blast cleaning is performed according to SSPC-SP16.  Excerpts from a few paragraphs of the standard describing the cleaning of bare, uncoated metal (galvanizing) are repeated below.  The sentences that were redacted address the criteria for any paint remaining on the surface, which is not applicable to this article.

喷砂清理根据SSPC - SP16进行。以下是标准中描述清理裸露未涂装金属(已镀锌)的几段摘录。节略的部分是关于表面残留油漆的标准，不适用于本文因此省略。

Paragraph 4.3.1 of the standard requires the removal of wet storage stain by means other than blast cleaning since the “dwell time” required to remove it by blast cleaning can damage the galvanizing.  Other methods are addressed in a non-mandatory Appendix.  Appendix Section A3 indicates that salts from wet storage stain can be removed with a nylon brush and water, or a dilute solution of acetic or citric acid, lime juice, or white vinegar, followed by rinsing with a large amount of water.

Appendix Section A8.1 indicates that to rece the risk of damage, blast cleaning is done with relatively low nozzle pressures (A8.2) and a softer abrasive with a Mohs hardness of 5 or less (A8.1.1.).

Appendix Section A9 recommends that the thickness of the galvanizing be measured before blast cleaning and again after blast cleaning to confirm that it meets the specified thickness.  The thickness requirements may be found in the procurement documents, or as required in ASTM A123, Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Procts, or ASTM A153/153M, Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

The Appendix (A9.2) cautions that in the presence of moisture, zinc oxides can form quickly on the surface after preparation, so it should remain dry, and painted as soon as possible.  The same recommendations for a minimum 5°F (3°C) spread between surface temperature and dew point temperature when preparing steel (steel temperature being the higher of the two), also apply to galvanizing.

该标准第4.3.1段要求通过喷砂清理以外的方式清除储存时产生的白锈印迹，因为喷砂清理白锈印迹所需的“停留时间”可能会损坏镀锌层。其他方法在非强制性附录中讨论。附录部分A3指出，储存时产生的白锈印迹可以用尼龙刷和水，或乙酸或柠檬酸、柠檬汁或白醋的稀溶液除去，然后用大量水冲洗。

附录部分A8.1指出，为了降低锌层破坏风险，喷砂清理采用相对较低的喷嘴压力( A8.2 )和莫氏硬度为5或更低的较软磨料( A8.1.1 )。

附录A9建议在喷砂清理前和喷砂清理后测量镀锌层厚度，以确认其符合规定膜厚。厚度要求见采购文件，或ASTM A123《钢铁制品镀锌(热浸镀锌)标准规范》或ASTM A153/153M《钢铁五金件镀锌(热浸镀锌)规范》。

附录( A9.2 )警告称，在潮湿条件下，喷砂清理后会在表面会迅速形成锌氧化物，因此应保持干燥，并尽快涂装。与钢结构表面处理相同，镀锌层表面处理时同样建议表面温度超出露点温度至少5°F ( 3°C )。

Aged Galvanizing – When galvanizing has weathered for 12 to 18 months, the surface will have oxidized and can often be prepared for painting by pressure washing alone.  The key is to remove surface dirt and debris as well as zinc salts and confirm that the surface is ll (photo 2).

镀锌层老化  – 当镀锌层已经风化12至18个月时，表面将被氧化，并且通常只需要高压清洗处理就可以准备涂装。关键是清除表面污物和锌渣以及锌盐，并确认表面暗化(图2 )。

Photo 2 – Exterior surfaces of the galvanizing have weathered and can likely be painted after pressure washing to remove the salts, but note the lack of oxidation and the visible spangle in the in the protected area (red arrow).  A test patch should be applied to determine if the adhesion is adequate without roughening and lling the surface.

图2– 镀锌层的外表面已经风化，可以在高压清洗除去盐分后进行涂装。但请注意保护区(红色箭头)内氧化物不多，有可见亮色的金属锌，应在该区域小范围涂漆测试，以确定未粗糙暗化的表面涂料附着力是否足够。

Depending on the condition of the steel, 3,000 psi with a rotating tip may be adequate, but it’s best to apply a test patch of the coating after cleaning and check the adhesion to make certain.  If there is any doubt regarding the adhesion of the coating, either of the methods described above for partially weathered galvanizing (etching cleaner or SP-16 Brush-Off Blast) should be used.

根据钢材（表面高压冲水）的经验，旋转喷嘴的压力在3000psi（约20MPa）应该足够，但最好在锌层表面高压冲水后小范围涂漆测试，并检查附着力以确保合格。如果对涂层的附着力有任何疑问，则应使用上述部分风化后镀锌层的任一表面处理方法(蚀刻清洗液或SP-16扫砂)。

Conclusion – Most coating failures on galvanizing are the result of poor adhesion of the coating to the galvanizing.  Poor adhesion is typically caused by a lack of roughening of the smooth galvanizing, an abundance of zinc salts beneath the coating film, or the presence of a passivating treatment that inhibits adhesion of the coating. When properly prepared, coatings will adhere well to galvanizing and improve the aesthetics and corrosion protection afforded by the galvanizing.  This article described a few common methods or preparing galvanizing for painting.  Other methods are described in:

ASTM D6386, Standard Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Proct and Hardware Surfaces for Painting

ASTM D7396, Standard Guide for Preparation of New, Continuous Zinc-Coated (Galvanized) Steel Surfaces for Painting

结论 – 镀锌过程中的大多数涂层失效是由于涂层与镀锌层的附着力差造成的。附着力差通常是由于光滑镀锌层的粗糙度不足、涂层下面锌盐的大量存在或抑制涂层粘附的钝化处理而引起的。经过适当的涂装前表面处理，涂层将很好地粘附到镀锌层上，并改善镀锌层的美观性和防腐性。本文介绍了几种常用的涂装前镀锌层表面处理方法。其他方法记录于如下标准:

ASTM D6386, 镀锌(热浸镀锌)钢铁制品和五金件涂装前表面处理的标准操作规程

ASTM D7396, 新的连续镀锌钢材涂装前表面处理的标准指南

原文作者介绍：

Ken Trimber is the President of KTA-Tator, Inc. He is Chairman of the SSPC Surface Preparation Committee and the SSPC Visual Standards Committee, as well as a member of the SSPC Standards Review Committee and ASTM DOl responsible for developing, reviewing and approving standards like the ones described in this article. He can be reached at [email protected]

ken Trimber，KTA-Tator公司的总裁，SSPC表面处理委员会和SSPC目视标准委员会主席，SSPC标准审查委员会和ASTM DOl成员，负责制定、审查和批准类似文中所述的标准。作者邮箱地址  [email protected]