CN105903665A - 一种仿镀锌工艺 - Google Patents

一种仿镀锌工艺 Download PDF

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CN105903665A
CN105903665A CN201610287070.9A CN201610287070A CN105903665A CN 105903665 A CN105903665 A CN 105903665A CN 201610287070 A CN201610287070 A CN 201610287070A CN 105903665 A CN105903665 A CN 105903665A
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郑航
王飞
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Ningbo Runner Industrial Corp
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract

本发明涉及到一种仿镀锌工艺，其特征在于包括下述步骤：1)对待处理工件表面进行前处理，去除工件表面的毛刺、油污及粉尘；2)在处理后的基体表面均匀喷涂一层粉末涂层，所述粉末涂层的厚度控制在40～80微米；然后在100～120℃下预热4～6分钟，得到预热工件；3)将所述预热工件浸入盛有铝粉的流化桶中，浸没时间在15S～20S；所述铝粉为粒径在40～60μm的鳞片状金属铝粉；4)从流化桶中取出工件，吹掉工件表面上未粘结的铝粉；5)将工件在180～200℃下固化10～20min，即得到仿镀锌工件成品。本发明实现了金属基材与粉末，粉末与金属粉末的有机结合，涂层具有粉末涂层的高防腐性能和油漆涂层的外观效果；全过程实现无废水排放，产品性能优于传统水电镀的性能效果。

Description

一种仿镀锌工艺
技术领域
本发明涉及到工件的表面处理，具体指一种仿镀锌工艺。
背景技术
随着国家对电镀污染控制的提高，目前传统电镀业正面临重新整顿和技术革新。而同时一些新的环保型技术正迅速发展，产品已能够做到与传统水电镀一样甚至还要优异的性能效果。
铝颜料因其具有卓越的遮盖能力，显著地屏蔽作用，独特的光学效果。大量的应用在粉末、油漆等涂料当中，起到增强防腐能力和外观效果。
发明内容
本发明所要解决的技术问题是针对现有技术的现状提供一种全过程无废水排放且工艺简单、能耗低的仿镀锌工艺。
本发明解决上述技术问题所采用的技术方案为：该仿镀锌工艺，其特征在于包括下述步骤：
1)对待处理工件表面进行前处理，去除工件表面的毛刺、油污及粉尘；
2)在处理后的基体表面均匀喷涂一层粉末涂层；所述粉末涂层的厚度控制在40～80微米；
然后在100～120℃下预热4～6分钟，得到预热工件；
3)将所述预热工件浸入盛有铝粉的流化桶中，浸没时间在15S～20S；
所述铝粉为粒径在40～60μm的鳞片状金属铝粉；
4)从流化桶中取出工件，吹掉工件表面上未粘结的铝粉；
5)将工件在180～200℃下固化10～20min，即得到仿镀锌工件成品。
所述环氧树脂可以根据需要选用现有技术中的任意一种，优选采用E-12环氧树脂。
上述各方案中，粉末涂层可以根据需要选用现有技术中的任意一种粉末喷涂形成粉末涂层，较好的，所述粉末涂层可以包括下述质量组成：
上述方案中，纹理剂和填料可以根据需要选用现有技术中的任意一种，较好的，所述纹理剂可以选用砂纹剂TL250或纹理剂QXSW-4TH；所述填料为沉淀硫酸钡、云母粉和碳酸钙的混合物；其中沉淀硫酸钡的粒径为3000～3500目、云母粉的粒径为800～1250目，碳酸钙的粒径为300～400目；三者的重量比为2：2：1。
所述前处理包括打磨、抛丸、除屑、除油、水洗，这些方法均为常规前处理方法。
与现有技术相比，本发明所提供的仿镀锌工艺为全新的表面处理工艺，实现了金属基材与粉末，粉末与金属粉末的有机结合，使得涂层具有一般粉末涂层的高防腐性能，又具有油漆涂层的外观效果；且工艺流程简单，能耗低，全过程实现无废水排放，避免了对周围环境的污染；并且处理后的产品性能优于传统水电镀的性能效果。
具体实施方式
以下结合实施例对本发明作进一步详细描述。
该管件金属铝颜料粉末流化法仿镀锌工艺包括下述步骤：
1)对待处理工件表面进行前处理，去除工件表面的毛刺、油污及粉尘；
前处理可以根据工件的具体情况选用常规的打磨、抛丸、除屑、除油、水洗工序中的一种单独使用或多种组合使用。
2)在处理后的工件表面均匀喷涂一层粉末涂层，所述粉末涂层的厚度控制在40～80微米；本实施例为60微米。
粉末涂层的质量组成如下：
本实施例中纹理剂选用砂纹剂TL250；
填料为沉淀硫酸钡、云母粉和碳酸钙的混合物；其中沉淀硫酸钡的粒径为3000～3500目、云母粉的粒径为800～1250目，碳酸钙的粒径为300～400目；三者的重量比为2：2：1。
然后将喷涂了粉末涂层的工件在100℃下预热5分钟，使粉末涂层中的树脂得到软化，得到预热工件；
3)将预热工件浸入盛有粒径为40～60μm铝粉的流化桶中，浸没时间20秒；使铝粉能充分附着在粉末层上。
向流化桶内通入压力为0.3-0.5MPa的压缩空气，压缩空气经桶底的流化板进行分流，桶内铝粉受到压缩气流作用，不断进行流动、翻滚。由于预热工件上的粉末涂层经过预热后，其中的树脂已经软化，粉末涂层带有粘性；当将预热工件浸入粉桶后，流化桶内流化的铝粉能很充分的粘附在工件的粉末涂层上。
4)从流化桶中取出工件，用压力为0.3-0.5MPa的压缩空气吹掉工件粘附的未粘结到粉末涂层上的多余铝粉。
5)将工件进行固化，固化温度180℃，15min，得到成品。
对处理好的工件进行下述功能测试：
(A)CASS防腐蚀：36h；测试方法：ASTM B368-09；
(B)冷热冲击循环：2个循环；测试方法：ASTM G85-09；
(C)结合力(百割)：5B；测试方法：ASTM D3359-02；
(D)铅笔硬度(TURQUOISE牌铅笔)：4H；测试方法：ASTM D3363-05；
(E)NSS盐雾：240H；测试方法：ASTM B117-11；
(F)湿度测试：96H；测试方法：(ASTM D2247) 。

Claims (5)

1.一种仿镀锌工艺，其特征在于包括下述步骤：
1)对待处理工件表面进行前处理，去除工件表面的毛刺、油污及粉尘；
2)在处理后的基体表面均匀喷涂一层粉末涂层；所述粉末涂层的厚度控制在40～80微米；
然后在100～120℃下预热4～6分钟，得到预热工件；
3)将所述预热工件浸入盛有铝粉的流化桶中，浸没时间在15S～20S；
所述铝粉为粒径在40～60μm的鳞片状金属铝粉；
4)从流化桶中取出工件，吹掉工件表面上未粘结的铝粉；
5)将工件在180～200℃下固化10～20min，即得到仿镀锌工件成品。
2.根据权利要求1所述的仿镀锌工艺，其特征在于所述环氧树脂为E-12环氧树脂。
3.根据权利要求1或2所述的仿镀锌工艺，其特征在于所述粉末涂层包括下述质量组成：
4.根据权利要求3所述的仿镀锌工艺，其特征在于所述纹理剂为砂纹剂TL250或纹理剂QXSW-4TH；所述填料为沉淀硫酸钡、云母粉和碳酸钙的混合物；其中沉淀硫酸钡的粒径为3000～3500目、云母粉的粒径为800～1250目，碳酸钙的粒径为300～400目；三者的重量比为2：2：1。
5.根据权利要求1所述的仿镀锌工艺，其特征在于所述前处理包括打磨、抛丸、除屑、除油、水洗。
CN201610287070.9A 2016-04-29 2016-04-29 一种仿镀锌工艺 Pending CN105903665A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1789353A (zh) * 2004-12-14 2006-06-21 嘉善维克托塑化有限公司 砂纹状粉末涂料及其生产工艺
CN102373395A (zh) * 2010-08-06 2012-03-14 上海集浪能源科技有限公司 一种表面喷涂铝粉的金属构件
CN103483978A (zh) * 2013-09-03 2014-01-01 安徽精一机械设备有限公司 一种砂纹状粉末涂料
CN104028442A (zh) * 2014-06-16 2014-09-10 张家港市华程异型钢管有限公司 金属粉末喷涂工艺

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1789353A (zh) * 2004-12-14 2006-06-21 嘉善维克托塑化有限公司 砂纹状粉末涂料及其生产工艺
CN102373395A (zh) * 2010-08-06 2012-03-14 上海集浪能源科技有限公司 一种表面喷涂铝粉的金属构件
CN103483978A (zh) * 2013-09-03 2014-01-01 安徽精一机械设备有限公司 一种砂纹状粉末涂料
CN104028442A (zh) * 2014-06-16 2014-09-10 张家港市华程异型钢管有限公司 金属粉末喷涂工艺

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Application publication date: 20160831