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电弧喷涂技术用于制备钢铁材料陶瓷涂层

发布时间:2016.07.25    点击数: 150929
        为提高海洋设备的耐海水腐蚀性能,采用高速电弧喷涂技术在钢材基体上制备陶瓷涂层,并采用有机硅树脂做封闭处理,取得了很好的效果,使材料的耐腐蚀性能得到大幅提高。他们的试验以Q235钢为基体材料,丝材粉芯为Fe基合金及碳化铬陶瓷等粉末。对Q235钢基体进行喷砂除油,固定在工作架上进行喷涂,电弧喷涂工艺参数为:电压35V,电流200A,压力0.65MPa,喷涂距离200mm。采用有机硅树脂进行封闭处理,部分辅以6%纳米氧化铝,将有机硅透明树脂涂刷至涂层表面,涂刷3~5次,以使有机硅充分渗入涂层,然后室温干燥,固化24小时以使有机硅树脂与基体结合稳定。
        检测表明,涂层呈现明显的层状堆砌结构,层与层之间结合较致密,但伴有部分孔隙,采用灰度法测量涂层的孔隙率为6.8%。在封闭处理之后封闭剂固化在涂层低洼处,这大大降低了涂层孔隙缺陷对其性能的影响。
        涂层硬度较高且分布均匀,平均硬度约1040HV0.1,远高于基体的硬度(170HV0.1)。结合强度测试显示所有试样均为胶断,表明涂层结合强度大于计算值48MPa,涂层与基体结合良好。
        电化学测试表明,未经封闭处理的原始涂层开路电位先稍微下降,然后上升,稳定在-0.62V;而封闭处理后涂层开路电位一直比较稳定,在-0.42V左右。由此可知,封闭处理降低了涂层对腐蚀介质的敏感度。封闭处理后涂层的腐蚀电位高于原始涂层,所以其腐蚀倾向低于原始涂层。有机硅封闭处理后涂层的腐蚀电流密度比原始涂层小一个数量级。封闭处理之后的涂层电阻值较大,电容值较小,拥有更好的绝缘性。这些实验结果表明,有机硅封闭处理后涂层的耐腐蚀性能获得了大幅度提高。
 
        用电弧喷涂技术在钢铁材料表面制备的陶瓷涂层具有较高的耐腐蚀性能,但存在的孔隙成了溶液以及氯离子侵入的便捷通道,加速了基体的腐蚀。有机硅树脂具有表面能低、憎水绝缘、经过固化后粘结强度高等特点,涂层经封闭处理之后,有机硅树脂填充了孔隙,阻挡了腐蚀介质的进入。并且,有机硅分子结构中活性基团,具有反应性,可以与基体材料牢牢地结合在一起,形成了一层非极性的有机基团向外的憎水膜,这有助于阻止腐蚀介质的渗入,提高材料的耐蚀性。
        关于QY千亿国际智能 About Liangshi InteRobot:
        上海QY千亿国际智能科技股份有限公司(股票代码:837430 厚积薄发 持续创新),为全球客户提供智能制造和表面处理系统解决方案,从业30多年,是一个集研发、设计、制造、工程安装、工程咨询于一体的专业化制造及自动化智能控制系统集成公司,能为客户解决:
        Shanghai Liangshi InteRobot Technology Corporation (Stock Code: 837430 Accumulate richly and break forth vastly; innovate continuously) provides surface treatment sandblasting system solution for global customers. By engaging in this industry for more than twenty years, we're a professional manufacturing and automatic intelligent control system corporation, which integrates researching, designing, manufacturing, project installation and project consulting. We can provide our customers with:
        1、化学表面处理喷抛丸、喷丸强化设备、热喷涂和涂装设备工艺系统解决方案和工艺装备;
              We provide process system solution and process equipments of surface treatment sandblasting shot blasting, shot peening, enameling, thermal spraying, coating equipment.
        2、智能制造自动化机器人应用工艺系统解决方案和工艺装备;
              We provide professional system solution and process equipments of automation and robot technology application.
        3、食品乳品、制药、生物、制冷、石油化工、船舶制造、能源、造纸、纺织系统领域承压系统集成整体解决方案;
              We provide professional integrated solution for pressure bearing system in fields of food dairy, biopharmaceutical, refrigerating, petrochemical, marine engineering, energy, paper-making, fabrics, etc.
        4、涂装环保设备:VOC废气、废水、粉尘处理和噪音治理系统工艺解决方案和工艺装备。
              We provide environment protection blasting and painting equipment: process solution and equipment of VOCs waste gas, waste water, dust, noise treatment system.
         5、专业提供压力容器设计制造:为食品乳品、生物制药、水处理、制冷、石油化工、船舶海工、电力能源、造纸纺织、有色金属等领域提供承压系统集成整体解决方案。
              Professionally provide the design and manufacture of pressure vessels: providing overall solutions for pressure system integration in the fields of food and dairy, biopharmaceutical, water treatment, refrigeration, petrochemical, shipbuilding and marine engineering, power and energy, paper and textile, non-ferrous metals and other fields.
        企业主导产品如下 The leading products of our company are as follows:
        主营业务:智能制造和表面处理工程系统集成的设计、研发、生产和销售。
        Main business: design, research, production and sales of surface treatment engineering system integration.
        六类主要产品:自动化涂装生产线、智能机器人喷涂系统、自动化喷抛丸生产线、智能机器人喷抛丸强化系统、自动化热喷涂系统、涂装节能环保设备。
        Six main product categories are: automatic painting production line, intelligent robot painting system, automatic shot/wheel blasting production line, intelligent robot shot peening system, automatic thermal spraying system, energy saving and environmental protection equipment for painting.
        产品主要应用于:新材料、新能源、工程机械、汽车制造、集装箱、船舶海洋工程、航空航天、港口桥梁、电子电气、环保工程、印刷造纸机械、医疗机械、纺织机械等领域。
        The products are mainly applied in: new materials, new energy, engineering machinery, automobile manufacturing, containers, marine engineering, aeronautics and astronautics, port bridges, electronic and electrical, environmental protection engineering, printing and papermaking machinery, medical machinery, textile machinery and so on.
        公司生产的表面工程系统集成具备智能、自动化的特点,可实现工业生产过程自动化控制,因而属于自动化装备。根据《高端装备制造业“十二五”规划》中对高端装备的定义“主要包括传统产业转型升级和战略性新兴产业发展所需的高技术高附加值装备”,公司产品属于高端装备,是为国民经济其他行业提供技术装备的战略性产业。
        The surface engineering system of our company integrates the characteristics of intelligence and automation, it can realize the automatic control of industrial production process, so it belongs to automatic equipment. According to the definition of premium-end equipment of 《The 125th programme of premium-end equipment manufacturing industry》, “it mainly includes the high technology and high value-added equipment required by traditional industrial transformation upgrading and the development of strategic new-emerging industries”. The company's products belong to the premium-end equipment, which is a strategic industry that provides technical equipment for the other industries of the national economy.
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