CN105671616A - 一种铝型材表面防腐处理工艺 - Google Patents

一种铝型材表面防腐处理工艺 Download PDF

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CN105671616A
CN105671616A CN201610151436.XA CN201610151436A CN105671616A CN 105671616 A CN105671616 A CN 105671616A CN 201610151436 A CN201610151436 A CN 201610151436A CN 105671616 A CN105671616 A CN 105671616A
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刘正峰
蒋军
顾凯
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Zhejiang Hong Chang Aluminum Co Ltd
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Abstract

本发明公开了一种铝型材表面防腐处理工艺:一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30?min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍5-8min、烘干、得到具有保护层的铝型材工件;所述化学处理液的配方为:HF?0.2-0.3g/L、氯化钠1-2g/L;接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层。

Description

一种铝型材表面防腐处理工艺
技术领域
本发明属于铝合金加工领域,特别涉及一种铝型材表面防腐处理工艺。
背景技术
我国是铝型材生产大国,根据中华人民共和国商务部2010年9月公布的统计数据,2009年,全球可生产铝型材的国家和地区约95个,生产企业约2200余家,其中我国的产能占世界总产能的比重超过50%,位列第一。2010年我国铝型材产销量将超过1000万t,其中建筑铝型材消费量可望突破600万t。金属材料的应用面临被腐蚀的问题,据中国科学院海洋研究所海洋腐蚀与防护研究发展中心分析,腐蚀损失占GDP的3%~5%,全世界每年因腐蚀而造成的直接经济损失约为7000亿美元。按最低比例3%计算,我国在2010年的GDP为39.79万亿元,腐蚀造成的经济损失超过1万亿元。
铝材在金属材料中占据重要地位,铝材受腐蚀而产生的损失相当严重。我国是铝型材生产大国,也是消费大国,同时是承受铝材被腐蚀所带来的经济损失的大国。铝材表面的自然氧化膜耐腐蚀能力有限,而且自然氧化膜与油漆等有机涂层结合力低,铝材在使用过程中容易受到腐蚀,因此铝材必须经过有效的防腐蚀处理。铝合金最佳的防腐蚀处理方法是预先制备表面转化膜,然后进行喷涂处理,公认防腐蚀最好的方法是传统的铬酸盐处理。但是六价铬有致癌毒性,美国及欧盟已经有明文限制,有毒元素铬必须得到取代。铝合金无铬钝化是使用化学方法,在铝合金表面原位生长不含铬元素的化学防腐蚀膜。世界上很多相关生产厂商声称他们已经具有六价铬的替代技术,但是从公开的测试结果分析,没有任何一种技术能够完全取代铬酸盐转化技术。
本发明旨在提供一种铝型材表面防腐处理工艺,其不含有毒物质,节能环保,防腐效果完全可以达到铬酸盐转化技术。
发明内容
本发明针对现有技术存在的缺陷,目的在于提供一种铝型材表面防腐处理工艺,其不含有毒物质,节能环保,防腐效果完全可以达到铬酸盐转化技术,防腐效果非常好。
本发明的目的可以通过以下技术方案实现:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍5-8min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.2-0.3g/L、氯化钠1-2g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂300-350份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯20-23份,钛白180份,NaH2PO48-10份,沉淀硫酸钡20-25份,安息香2份,流平剂5份。
本发明的有益之处在于:
本发明提供的铝型材表面防腐处理工艺,其不含有毒物质,节能环保,防腐效果完全可以达到铬酸盐转化技术,防腐效果非常好。
具体实施方式
实施例1:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍5min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.3g/L、氯化钠1g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂350份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯20份,钛白180份,NaH2PO410份,沉淀硫酸钡20份,安息香2份,流平剂5份。
结果:
耐酸性(3%盐酸/h)320h无变化,耐碱性(5%氢氧化钠)178h无变化,耐盐雾580h。
实施例2:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍8min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.2g/L、氯化钠2g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂300份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯23份,钛白180份,NaH2PO48份,沉淀硫酸钡25份,安息香2份,流平剂5份。
结果:
耐酸性(3%盐酸/h)280h无变化,耐碱性(5%氢氧化钠)201h无变化,耐盐雾500h。
实施例3:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍6min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.3g/L、氯化钠1g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂340份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯21份,钛白180份,NaH2PO49份,沉淀硫酸钡21份,安息香2份,流平剂5份。
结果:
耐酸性(3%盐酸/h)310h无变化,耐碱性(5%氢氧化钠)190h无变化,耐盐雾560h。
实施例4:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍7min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.2g/L、氯化钠2g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂310份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯22份,钛白180份,NaH2PO410份,沉淀硫酸钡24份,安息香2份,流平剂5份。
结果:
耐酸性(3%盐酸/h)290h无变化,耐碱性(5%氢氧化钠)188h无变化,耐盐雾510h。
实施例5:
一种铝型材表面防腐处理工艺,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍5min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.3g/L、氯化钠1g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂330份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯23份,钛白180份,NaH2PO48份,沉淀硫酸钡23份,安息香2份,流平剂5份。
结果:
耐酸性(3%盐酸/h)300h无变化,耐碱性(5%氢氧化钠)179h无变化,耐盐雾540h。
可见,本发明提供的铝型材表面防腐处理工艺,其不含有毒物质,节能环保,防腐效果完全可以达到铬酸盐转化技术,防腐效果非常好。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (2)

1.一种铝型材表面防腐处理方法,其特征在于:
一种防腐铝型材的制备方法,包括常规的脱脂、水洗、阳极氧化、喷涂、固化处理,所述阳极氧化之后、喷涂之前还进行表面化学处理;
所述表面化学处理的具体工艺步骤为:制备化学处理液、将经过阳极氧化的铝型材工件依次放入丙酮、乙醇、去离子水中超声30min,然后用氮气吹干;放入化学处理液中65℃恒温水浴浸渍5-8min、烘干、得到具有保护层的铝型材工件;
所述化学处理液的配方为:HF0.2-0.3g/L、氯化钠1-2g/L;
接着在表面化学处理后的铝型材工件上喷涂防腐涂层,喷涂0.8min,喷淋压力为0.03Mpa,经过200℃热熔后,急速冷却,即制得防腐涂层;
所述防腐涂层的配方为,按照重量份数:聚酯树脂300-350份,二甲基乙酰胺5份,异氰脲酸三缩水甘油酯20-23份,钛白180份,NaH2PO48-10份,沉淀硫酸钡20-25份,安息香2份,流平剂5份。
2.权利要求1所述的铝型材表面防腐处理方法处理的铝型材。
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