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                              第一,优选磷酸液。磷化膜的品质优劣主要表现在晶体粗细和致密程度、表面有无沉淀物及膜厚等方面,它们的差异直接影响磷化膜的品质。目前普遍采用磷化膜主要由铁系、锌系、锰系、锌钙系等磷酸盐溶液进行磷化,其中锌钙系性能最优良。

                             第二,控制工艺参数。关键要控制磷化温度(2540℃),时间(320min),促进剂含量(35气点)及总酸度(2040点)和游离酸度(0.83点)。

                             温度过太低则不能成膜或成膜速度慢,膜不完整,易泛黄?#29615;粗?#33180;粗大,耐蚀性低,同时槽液稳定性变差,沉渣增多。

                             促进剂含量低,成膜慢,膜层泛黄?#29615;粗?#27785;渣明显增多,膜层带彩色。

                             总酸度稍高,能加快磷化反应的进行,磷化膜薄而致密。但不宜过高,否则沉渣多,膜层?#19968;搖?#28216;离酸度低,有利于降低磷化温度和沉渣量?#29615;粗?#27785;渣增多,甚至不成膜。

                             其次,还要掌握槽液的调整方法。具备化验条件的企业,做到磷化前检测槽液总酸度、游离酸度、促进剂气点等,?#32454;?#27133;液管理。凭经验管理槽液效果也不错,槽液要定期排渣和更新。如每周排渣一次,脱脂槽、表面调整槽每月更新一次。

                             典型的磷化工艺

                              ①脱脂金属脱脂剂(JF-CL188),6065℃,34min)→热水洗(8090℃)→酸洗(HCIH2O=11,除锈加速剂适量,56min)→水洗→表面调整(表面调整剂5g/L1min)→磷化(常温,冬天适当加温,6min)→二道水洗→烘干。

                              ②脱脂金属脱脂剂(JF-CL188),3040℃,510min)→水洗→酸洗(HCIH2O=14,除锈加速剂适量,2030min)→水洗→表面调整(表面调整剂5g/L1min)→磷化(常温,2030min)→水洗→烘干。

                              ③脱脂金属脱脂剂(JF-CL188),6070℃,3min)→热水洗(8090℃)→表面调整(表面调整剂5g/L1min)→磷化(3040℃,1020min)→水洗→烘干(脱脂前手工除去局部浮锈,浸渍脱脂后手工擦洗补充除油)。

                            ④脱脂表面调整“二合一?#20445;?/span>JF-PK105)(4050℃,510min)→水洗→酸洗(HCIH2O=1110min)→水洗→(表面调整剂5g/L1min)→磷化(3040℃,2030min)→水洗→烘干

                            上海建飞环保科技有限公司,主营金属表面除油脱脂剂、除锈剂、表调剂、磷化液、防锈剂防锈油、封闭剂、钝化剂、发黑剂、等金属表面处理剂及喷漆、电镀等原材料。欢迎来电来函来邮件咨询各种金属表面前处理技术和定购选用处理剂产品,为客户提供全方位的配套服务!请相信你们的选择!信息请浏览

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                            咨询热线:13482664672   021-60521847


                            2016年05月19日

                            JF-PF329钢铁六合一清洗剂

                            磷化工艺的选用及典型的磷化工艺


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