The invention discloses a formulation design compatible with chromium-free passivation tank for aluminium alloy powder spraying oil removal tank, which thoroughly solves the instability of 1 # oil removal tank and 4 # chromium-free passivation tank, easily produces fluorine-containing sludge at the bottom of the tank, and requires manual cleaning of highly toxic and dangerous waste. The traditional degreasing tank and chromium-free passivation tank have insufficient stability components and are easy to decompose and precipitate. The degreasing component is often incompatible when it is brought into 4 chromium-free passivation tank through 3 # washing tank. The invention is compatible with the composition of the 4 # chromium-free passivation tank by the composition of the 1 # oil removal tank. The oil removal liquid not only does not consume the chromium-free passivation tank agent, but also can supplement the composition and reduce the production cost. By adding corrosion inhibitors, chelating agents and phosphating agents, the invention chelates cations, eliminates the generation of fluorides and hydroxides, ensures that the bath liquid is not turbid and precipitated, and realizes stable production of chromium-free passivation pretreatment for aluminum alloy powder spraying.
【技术实现步骤摘要】
铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计
本专利技术涉及铝合金喷涂无铬钝化预处理
,尤其涉及铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计。
技术介绍
长期以来,人们已经认识到了含铬钝化技术从铝型材生产、使用和废弃处理全过程严重的铬污染,实现铝型材表面无铬钝化处理是铝材制造业追求的目标。为满足工业界对无铬钝化技术的需求,研究人员开展了大量的研究工作,在近三十年的铝及其合金表面无铬钝化的工艺技术研究中,产生了多种铝及铝合金无铬钝化处理的研究结果,如锆钛系无铬钝化、钼盐系无铬钝化、稀土盐系无铬钝化、有机硅烷系无铬钝化等。这些国内外已有的报道,要么仅进行了实验室研究,要么虽然进行了中试,但由于结果不理想而放弃。目前还没有一种研究结果能够实现建筑铝型材的规模化应用。(1)锆钛系无铬钝化技术由美国AmchemProductsInc.等在20世纪80年代初首先提出,随后德国Henkel、日本Parker等公司开展了大量研究。锆钛系无铬钝化液主要含有H2ZrF6和H2TiF6。铝合金在该处理液发生一系列的化学反应和水解作用,生成的转化膜是由三氧化二铝、锆、钛与氟的络合物 ...
【技术保护点】
1.铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计,其特征在于,包括除油槽和无铬钝化槽,所述除油槽内含有除油剂,所述无铬钝化槽内含有无铬钝化剂;所述除油剂的化学组分包括氢氟酸和PBTCA,氢氟酸(50wt.%):PBTCA(50wt.%)=3:1,所述除油剂浓度20‑30g/L,酸度值0.5‑1.0当量;所述无铬钝化剂的化学组分包括氟钛酸、氟锆酸和PBTCA,氟钛酸(50wt.%):氟锆酸(50wt.%):PBTCA(50wt.%)=0.5:0.5:1,所述钝化剂浓度5.0‑8.0g/L;铝合金在所述除油槽除油后进入无铬钝化槽进行钝化,所述除油槽对无铬钝化槽药剂兼容,当所述除 ...
【技术特征摘要】
1.铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计,其特征在于,包括除油槽和无铬钝化槽,所述除油槽内含有除油剂,所述无铬钝化槽内含有无铬钝化剂;所述除油剂的化学组分包括氢氟酸和PBTCA,氢氟酸(50wt.%):PBTCA(50wt.%)=3:1,所述除油剂浓度20-30g/L,酸度值0.5-1.0当量;所述无铬钝化剂的化学组分包括氟钛酸、氟锆酸和PBTCA,氟钛酸(50wt.%):氟锆酸(50wt.%):PBTCA(50wt.%)=0.5:0.5:1,所述钝化剂浓度5.0-8.0g/L;铝合金在所述除油槽除油后进入无铬钝化槽进行钝化,所述除油槽对无铬钝化槽药剂兼容,当所述除油剂的成分被铝合金携带入无铬钝化槽后,所述无铬钝化槽运行稳定。2.根据权利要求1所述的铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计,其特征在于,在所述除油剂中,氢氟酸(50wt.%)浓度为15-22.5g/L,PBTCA(50wt.%)浓度为5-7.5g/L。3.根据权利要求1所述的铝合金喷涂除油槽对无铬钝化槽药剂兼容配方设计,其特征在于,在所述无铬钝化剂中,氟钛酸(50wt.%)浓度为1.25-2.0g/L,氟锆酸(50wt.%)浓度为1.25-2.0g/L,PBTCA(50wt.%)浓度为2.5-4.0g/L。4.根据权利要求1、2或3所述的铝合金粉末喷涂除油槽对无铬钝化槽药剂兼容配方设计,其特征在于,在所述无铬钝化槽之前和之后均配置流动清洗槽,所述铝合金在进入无铬钝化槽...
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