CN105951090A - 一种铝板的钝化方法 - Google Patents
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
- C23C22/364—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing also manganese cations
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
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Abstract
本发明涉及一种铝板的钝化方法,包括以下步骤:(1)、清洗、处理剂初步处理;(2)、将上述步骤处理好的铝板烘干,使用聚丙二醇二缩水甘油醚溶液喷涂在铝板表面,喷涂量为5ml/m2;(3)、在步骤(2)处理完成1min内,将铝板放入钝化液进行钝化处理,钝化处理时间为15‑20s。本发明的方法在对铝板处理时,先使用多种盐溶液进行处理,不仅能除去污垢,而且处理后使铝表面更容易处理,提升钝化处理的效率及处理的均匀性,本申请的钝化液结合各处理剂的使用,能够使铝表面形成致密的氧化膜,其处理更均匀,处理效果更好。
Description
技术领域
本发明属于金属表面处理领域,具体涉及一种铝板的钝化方法。
背景技术
铝及铝合金是当前用途十分广泛的、最经济适用的材料之一。世界铝产量从1956年开始超过铜产量一直居有色金属之首。当前铝的产量和用量(按吨计算)仅次于钢材,成为人类应用的第二大金属;而且铝的资源十分丰富,据初步计算,铝的矿藏储存量约占地壳构成物质的8%以上。铝用途广泛,但是在使用前往往需要进行钝化处理,提升其稳定性。
发明内容
本发明的目的是提供一种铝板的钝化方法,对铝板表面进行钝化,提升了铝板的防腐性能。
一种铝板的钝化方法,包括以下步骤:
(1)、将铝板表面放入浸泡槽中,使用40℃、质量分数为2.5%的碳酸氢钠溶液浸泡处理30s,然后使用无纺布擦洗,然后使用质量分数为0.5%的柠檬酸溶液浸泡处理20s,浸泡过程中使用无纺布擦洗,然后使用质量分数1.2%的尿素水溶液浸泡处理5s,使用清水冲洗;
(2)、将上述步骤处理好的铝板烘干,使用聚丙二醇二缩水甘油醚溶液喷涂在铝板表面,喷涂量为5ml/m2,所述聚丙二醇二缩水甘油醚溶液按重量计由以下原料制成:聚丙二醇二缩水甘油醚2.5份、甘油5份、体积分数75%乙醇溶液8份;
(3)、在步骤(2)处理完成1min内,将铝板放入钝化液进行钝化处理,钝化处理时间为15-20s,每升钝化液中含硫酸铝钾2-3g、氢氟酸3-5ml、钛酸钾3-5g、高锰酸钾8-10g、六偏磷酸钠0.5-1g、叔丁醇3-5g,调节钝化液的PH为5.5-6.5。
优选地,所述的每升钝化液中含硫酸铝钾2.2g、氢氟酸3.5ml、钛酸钾4g、高锰酸钾9g、六偏磷酸钠0.6g、叔丁醇5g,调节钝化液的PH为5.5-6.5。
本发明的有益效果:本发明的方法在对铝板处理时,先使用多种盐溶液进行处理,不仅能除去污垢,而且处理后使铝表面更容易处理,提升钝化处理的效率及处理的均匀性,本申请的钝化液结合各处理剂的使用,能够使铝表面形成致密的氧化膜,其处理更均匀,处理效果更好,处理后的钝化膜强度大,具有很好的耐磨性,处理液不含铬,无明显污染,本发明中各步骤中的温度及时间控制,对铝板的钝化处理效果有很大的影响,本发明也验证了不同温度及时间控制,结果其钝化效果明显不如本申请处理的效果。
具体实施方式
实施例1
一种铝板的钝化方法,包括以下步骤:
(1)、将铝板表面放入浸泡槽中,使用40℃、质量分数为2.5%的碳酸氢钠溶液浸泡处理30s,然后使用无纺布擦洗,然后使用质量分数为0.5%的柠檬酸溶液浸泡处理20s,浸泡过程中使用无纺布擦洗,然后使用质量分数1.2%的尿素水溶液浸泡处理5s,使用清水冲洗;
(2)、将上述步骤处理好的铝板烘干,使用聚丙二醇二缩水甘油醚溶液喷涂在铝板表面,喷涂量为5ml/m2,所述聚丙二醇二缩水甘油醚溶液按重量计由以下原料制成:聚丙二醇二缩水甘油醚2.5份、甘油5份、体积分数75%乙醇溶液8份;
(3)、在步骤(2)处理完成1min内,将铝板放入钝化液进行钝化处理,钝化处理时间为15s,每升钝化液中含硫酸铝钾2.2g、氢氟酸3.5ml、钛酸钾4g、高锰酸钾9g、六偏磷酸钠0.6g、叔丁醇5g,其余原料为水,调节钝化液的PH为5.5。
将本发明处理后的铝板使用盐雾试验进行测试:
采用5%的氯化钠盐水溶液,溶液PH值为6.5作为喷雾用的溶液。试验温度为35℃,盐雾的沉降率为2.2ml/(80cm2.h),喷雾压力:0.05Mpa。
根据实验标准,产生生锈白斑开始停止实验,实验重复3次,实验结果如下:596h;598h;596h。
实施例2
一种铝板的钝化方法,包括以下步骤:
(1)、将铝板表面放入浸泡槽中,使用40℃、质量分数为2.5%的碳酸氢钠溶液浸泡处理30s,然后使用无纺布擦洗,然后使用质量分数为0.5%的柠檬酸溶液浸泡处理20s,浸泡过程中使用无纺布擦洗,然后使用质量分数1.2%的尿素水溶液浸泡处理5s,使用清水冲洗;
(2)、将上述步骤处理好的铝板烘干,使用聚丙二醇二缩水甘油醚溶液喷涂在铝板表面,喷涂量为5ml/m2,所述聚丙二醇二缩水甘油醚溶液按重量计由以下原料制成:聚丙二醇二缩水甘油醚2.5份、甘油5份、体积分数75%乙醇溶液8份;
(3)、在步骤(2)处理完成1min内,将铝板放入钝化液进行钝化处理,钝化处理时间为19s,每升钝化液中含硫酸铝钾3g、氢氟酸3.6ml、钛酸钾4.2g、高锰酸钾9g、六偏磷酸钠0.8g、叔丁醇4.5g,调节钝化液的PH为6。
将本发明处理后的铝板使用盐雾试验进行测试:
采用5%的氯化钠盐水溶液,溶液PH值为6.5作为喷雾用的溶液。试验温度为35℃,盐雾的沉降率为2.2ml/(80cm2.h),喷雾压力:0.05Mpa。
根据实验标准,产生生锈白斑开始停止实验,实验重复3次,实验结果如下:598h;599h;599h。
Claims (2)
1.一种铝板的钝化方法,其特征在于,包括以下步骤:
(1)、将铝板表面放入浸泡槽中,使用40℃、质量分数为2.5%的碳酸氢钠溶液浸泡处理30s,然后使用无纺布擦洗,然后使用质量分数为0.5%的柠檬酸溶液浸泡处理20s,浸泡过程中使用无纺布擦洗,然后使用质量分数1.2%的尿素水溶液浸泡处理5s,使用清水冲洗;
(2)、将上述步骤处理好的铝板烘干,使用聚丙二醇二缩水甘油醚溶液喷涂在铝板表面,喷涂量为5ml/m2,所述聚丙二醇二缩水甘油醚溶液按重量计由以下原料制成:聚丙二醇二缩水甘油醚2.5份、甘油5份、体积分数75%乙醇溶液8份;
(3)、在步骤(2)处理完成1min内,将铝板放入钝化液进行钝化处理,钝化处理时间为15-20s,每升钝化液中含硫酸铝钾2-3g、氢氟酸3-5ml、钛酸钾3-5g、高锰酸钾8-10g、六偏磷酸钠0.5-1g、叔丁醇3-5g,调节钝化液的PH为5.5-6.5。
2.根据权利要求1所述的一种铝板的钝化方法,其特征在于,所述的每升钝化液中含硫酸铝钾2.2g、氢氟酸3.5ml、钛酸钾4g、高锰酸钾9g、六偏磷酸钠0.6g、叔丁醇5g,调节钝化液的PH为5.5-6.5。
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CN108060414A (zh) * | 2017-12-14 | 2018-05-22 | 马鞍山新徽铝业有限公司 | 一种铝板钝化液 |
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CN108060414A (zh) * | 2017-12-14 | 2018-05-22 | 马鞍山新徽铝业有限公司 | 一种铝板钝化液 |
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