镀液成分及施镀温度对不锈钢表面化学镀Fe-Zn合金性能的影响
发布时间：2018-08-14 19:41
【摘要】：不锈钢的硬度低,耐磨性差,摩擦因数大,易发生局部损伤和表面钝化膜受损而导致的局部腐蚀。为了提高不锈钢的综合性能,常对其进行表面处理。其中化学镀成本低廉、均镀以及深镀能力好。铁锌合金作为一种防护性镀层具有优异的软磁性能和良好的耐蚀性及电催化性,同时合金成分使基体材料产生一些电镀产品不具备的物理化学性能,例如化学镀金等到的镀层使基体的耐磨性和可焊性得到提高,因此在电子元器件以及光学元件中有广泛的应用。近年来有关化学镀Fe-Zn合金的研究较少。本文用化学镀的方法在不锈钢基体上施镀Fe-Zn二元合金镀层,采用正交试验法和单因素变量法研究镀液中各成分和施镀温度的变化对镀层沉积速率的影响,并运用显微硬度计、SEM等技术研究了沉积工艺条件对镀层的硬度、耐腐蚀性能和镀层形貌的影响。试验结果显示,在研究镀液成分时,对于不同的镀液成分Fe-Zn合金镀速大小为:ZnSO_4·7H_2OC_4H_4O_6KNa·4H_2OFeSO_4·7H_2ONaH_2PO_2·H_2O。镀速的大小主要是和镀液中Zn~(2-)浓度成正比。镀层耐腐蚀性能的研究结果显示:镀液成分中的ZnSO_4·7H_2O,FeSO_4·7H_2O对耐腐蚀性影响较大。对镀层硬度的研究表明,镀液成分对镀层硬度大小的影响为:FeSO_4·7H_2ONaH_2PO_2·H_2OC_4H_4O_6KNa·4H_2OZnSO_4·7H_2O。从而看出镀液中的Fe2+对镀层硬度大小有很大的影响。同等条件下,化学实验的其他条件不变,随着化学温度的升高,化学镀Fe-Zn合金沉积速率和显微硬度都是先增大后减小。研究结果显示进行化学镀Fe-Zn合金镀层:施镀温度为55℃,光亮剂1g/L,C_4H_4O_6KNa·4H_2O 67g/L,NaOH 35g/L,Zn SO_4·7H_2O 7g/L,FeSO_4·7H_2O 8g/L,H_3BO_3 1g/L,NaH_2PO2·H_2O 9g/L。在最佳工艺条件下,化学镀Fe-Zn合金的镀速和镀层的维氏硬度值分别达到最大值5.46 mg/(cm2·h)和534HV。镀层扫描电镜分析表明,镀层颗粒大小均匀,排列紧密。能谱仪分析出镀层中锌含量为14.83!,铁含量为85.17!,不含其他杂质。
[Abstract]:Stainless steel has low hardness, poor wear resistance, high friction coefficient and local corrosion caused by local damage and surface passivation film damage. In order to improve the comprehensive properties of stainless steel, surface treatment is often carried out. The cost of electroless plating is low, and the ability of uniform plating and deep plating is good. As a kind of protective coating, Fe-Zn alloy has excellent soft magnetic properties, good corrosion resistance and electrocatalysis, and the alloy composition makes the matrix material produce some physical and chemical properties that the electroplating products do not possess. For example, electroless gold plating can improve the wearability and solderability of the substrate, so it is widely used in electronic components and optical components. In recent years, there are few studies on electroless Fe-Zn alloy plating. In this paper, Fe-Zn binary alloy coating was deposited on stainless steel substrate by electroless plating method. The effects of composition and temperature of plating bath on deposition rate were studied by orthogonal test and single factor variable method. The effect of deposition conditions on the hardness, corrosion resistance and morphology of the coating was studied by means of microhardness tester SEM and so on. The results show that the plating rate of Fe-Zn alloy with different bath composition is 1: ZnSO4 7H_2OC_4H_4O_6KNa 4H_2OFeSO_4 7H_2ONaH_2PO_2 H _ 2O _ 2 when the bath composition is studied. The rate of plating is mainly proportional to the concentration of Zn ~ (2 -) in the bath. The corrosion resistance of the coating is studied. The results show that ZnSO_4 7H _ 2O _ 2O _ 2O _ 4 7H_2O in the bath has a great effect on the corrosion resistance. The study on the hardness of the coating shows that the effect of the composition of the plating bath on the hardness of the coating is as follows: 1 FeSO4 7H_2ONaH_2PO_2 H_2OC_4H_4O_6KNa 4H_2OZnSO_4 7H _ 2O _ 2. It is shown that the Fe2 in the plating bath has a great influence on the hardness of the coating. Under the same conditions and other conditions of chemical experiment, the deposition rate and microhardness of electroless Fe-Zn alloy increase first and then decrease with the increase of chemical temperature. The results showed that electroless Fe-Zn alloy coating was deposited at 55 鈩，
本文编号：2183927
[Abstract]:Stainless steel has low hardness, poor wear resistance, high friction coefficient and local corrosion caused by local damage and surface passivation film damage. In order to improve the comprehensive properties of stainless steel, surface treatment is often carried out. The cost of electroless plating is low, and the ability of uniform plating and deep plating is good. As a kind of protective coating, Fe-Zn alloy has excellent soft magnetic properties, good corrosion resistance and electrocatalysis, and the alloy composition makes the matrix material produce some physical and chemical properties that the electroplating products do not possess. For example, electroless gold plating can improve the wearability and solderability of the substrate, so it is widely used in electronic components and optical components. In recent years, there are few studies on electroless Fe-Zn alloy plating. In this paper, Fe-Zn binary alloy coating was deposited on stainless steel substrate by electroless plating method. The effects of composition and temperature of plating bath on deposition rate were studied by orthogonal test and single factor variable method. The effect of deposition conditions on the hardness, corrosion resistance and morphology of the coating was studied by means of microhardness tester SEM and so on. The results show that the plating rate of Fe-Zn alloy with different bath composition is 1: ZnSO4 7H_2OC_4H_4O_6KNa 4H_2OFeSO_4 7H_2ONaH_2PO_2 H _ 2O _ 2 when the bath composition is studied. The rate of plating is mainly proportional to the concentration of Zn ~ (2 -) in the bath. The corrosion resistance of the coating is studied. The results show that ZnSO_4 7H _ 2O _ 2O _ 2O _ 4 7H_2O in the bath has a great effect on the corrosion resistance. The study on the hardness of the coating shows that the effect of the composition of the plating bath on the hardness of the coating is as follows: 1 FeSO4 7H_2ONaH_2PO_2 H_2OC_4H_4O_6KNa 4H_2OZnSO_4 7H _ 2O _ 2. It is shown that the Fe2 in the plating bath has a great influence on the hardness of the coating. Under the same conditions and other conditions of chemical experiment, the deposition rate and microhardness of electroless Fe-Zn alloy increase first and then decrease with the increase of chemical temperature. The results showed that electroless Fe-Zn alloy coating was deposited at 55 鈩，
本文编号：2183927
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