CN204346881U - Metal erosion behavior monitoring system in Flow Corrosion medium - Google Patents
Metal erosion behavior monitoring system in Flow Corrosion medium Download PDFInfo
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Abstract
本实用新型涉及一种流动腐蚀介质中金属腐蚀行为监测系统，该系统将电化学测试手段和失重法结合在一起，可以同时完成流动体系下金属腐蚀的全方位监测。该系统由腐蚀介质更新系统、循环管道系统、电化学测试系统和失重实验装置四部分组成，其中，腐蚀介质更新系统通过带有止回阀的管道与循环管道系统连接，电化学测试系统和失重实验装置串联在循环管道系统内。本实用新型设计科学合理，腐蚀数据获取快捷准确，可以实现同时对流动腐蚀介质中的金属材料的电化学腐蚀测量和失重实验研究，是一种较为先进快捷的金属材料腐蚀行为监测手段，通过将电化学测量手段和失重法结合，极大地拓展了金属材料腐蚀的研究手段。
The utility model relates to a metal corrosion behavior monitoring system in a flowing corrosion medium. The system combines electrochemical testing means and a weight loss method, and can simultaneously complete all-round monitoring of metal corrosion in a flowing system. The system consists of four parts: corrosive medium renewal system, circulation pipeline system, electrochemical test system and weight loss experimental device. Among them, the corrosive medium renewal system is connected to the circulation pipeline system through a pipeline with a check valve. The experimental devices are connected in series in the circulation piping system. The utility model has a scientific and reasonable design, quick and accurate acquisition of corrosion data, and can realize electrochemical corrosion measurement and weight loss experimental research on metal materials in flowing corrosion medium at the same time. The combination of electrochemical measurement means and weight loss method has greatly expanded the research means of corrosion of metal materials.
Description
技术领域technical field
本实用新型属于金属材料保护领域，涉及金属腐蚀行为的监测，尤其是一种流动腐蚀介质中金属腐蚀行为的监测系统。The utility model belongs to the field of metal material protection and relates to the monitoring of metal corrosion behavior, in particular to a monitoring system for metal corrosion behavior in flowing corrosion medium.
背景技术Background technique
金属材料是国防工业发展必不可少的基础材料，因其良好的塑性、强度和加工性能在国民经济生产中得到了广泛应用，而金属的腐蚀失效作为金属材料失效的主要形式之一，一直是金属材料保护的研究重点。电化学测量方法作为观测材料耐蚀性能的一种手段，因其快速、可连续监测等优点而被用于金属材料及其镀层的腐蚀性能研究。但现有腐蚀试验监测系统尚不能对流动腐蚀介质中的金属材料进行实时电化学腐蚀测量，无法获得动态腐蚀过程中的腐蚀数据，限制了电化学方法在金属腐蚀领域的应用。Metal materials are essential basic materials for the development of the national defense industry. Because of their good plasticity, strength and processing properties, they have been widely used in national economic production, and metal corrosion failure, as one of the main forms of metal material failure, has always been The focus of research on the protection of metal materials. As a means of observing the corrosion resistance of materials, the electrochemical measurement method is used in the research of the corrosion performance of metal materials and their coatings due to its advantages of rapidity and continuous monitoring. However, the existing corrosion test monitoring system is still unable to perform real-time electrochemical corrosion measurement of metal materials in the flowing corrosion medium, and cannot obtain corrosion data during the dynamic corrosion process, which limits the application of electrochemical methods in the field of metal corrosion.
发明内容Contents of the invention
本实用新型的目的在于克服现有腐蚀监测系统的不足，提供一种流动腐蚀介质中金属腐蚀行为监测系统，是利用循环管道系统在研究金属材料表面形成流动条件，并通过外联腐蚀介质更新系统对循环管道内腐蚀介质进行周期性渐变更新，最大可能接近实际工况的条件下对金属材料进行电化学腐蚀测量。The purpose of this utility model is to overcome the deficiencies of the existing corrosion monitoring system and provide a metal corrosion behavior monitoring system in the flowing corrosion medium, which is to use the circulation pipeline system to form the flow condition on the surface of the metal material, and update the system through the external corrosion medium The corrosive medium in the circulating pipeline is updated periodically and gradually, and the electrochemical corrosion measurement of metal materials is carried out under the conditions that are as close as possible to the actual working conditions.
本实用新型解决其技术问题是通过以下技术方案实现的：The utility model solves its technical problem and realizes through the following technical solutions:
一种流动腐蚀介质中金属腐蚀行为监测系统，该系统将电化学测试手段和失重法结合在一起，可以同时完成流动体系下金属腐蚀的全方位监测。该系统由腐蚀介质更新系统、循环管道系统、电化学测试系统和失重实验装置四部分组成，其中，腐蚀介质更新系统通过一连接管道与循环管道系统相连，电化学测试系统和失重实验装置先后串联在循环管道系统内。A metal corrosion behavior monitoring system in a flowing corrosive medium. The system combines electrochemical testing methods and weight loss methods, and can simultaneously complete all-round monitoring of metal corrosion in a flowing system. The system consists of four parts: corrosive medium renewal system, circulation piping system, electrochemical testing system and weight loss experimental device. Among them, the corrosive medium refreshing system is connected to the circulating piping system through a connecting pipe, and the electrochemical testing system and weight loss experimental device are connected in series. in the circulation piping system.
而且，所述腐蚀介质更新系统一种实现为大容积储备水箱，水箱侧面设有1号取样口和进水口，水箱底部设有引出管和放空管，引出管上接一更新泵以提供腐蚀介质补给动力，放空管上接一常闭阀门。Moreover, one implementation of the corrosive medium renewal system is a large-volume reserve water tank. The side of the water tank is provided with a No. 1 sampling port and a water inlet. The bottom of the water tank is provided with a lead-out pipe and a vent pipe. A refreshment pump is connected to the lead-out pipe to provide corrosion protection. The power is supplied by the medium, and a normally closed valve is connected to the vent pipe.
而且，所述循环管道系统主要包括循环泵、流量计、2号取样口、排水口、杂物过滤器、节流阀、电化学测试系统接口、失重实验装置接口等部件，按水流方向，其中一支路为流量计、电化学测试系统接口、失重实验装置接口、2号取样口、节流阀从前往后用管道依次串接，另一支路为循环泵、杂物过滤器先后用管道依次串接，两支路的分岔起始点位于循环管道系统与腐蚀介质更新系统的连接管道末端，排水口位于两支路汇合点后的直线管道末端，调节其阀门开启度来改变循环管道系统内腐蚀介质更新速率。Moreover, the circulating pipeline system mainly includes components such as a circulating pump, a flow meter, No. 2 sampling port, a drain port, a debris filter, a throttle valve, an electrochemical test system interface, and a weight loss experimental device interface. According to the direction of water flow, wherein One branch is the flow meter, the interface of the electrochemical test system, the interface of the weight loss experiment device, the No. 2 sampling port, and the throttle valve are connected in series from the front to the back, and the other branch is the circulation pump and the debris filter. The two branches are connected in series. The starting point of the bifurcation of the two branches is located at the end of the connecting pipe between the circulating pipeline system and the corrosive medium renewal system. The drain is located at the end of the straight line pipeline after the confluence of the two branches. Internal corrosion medium update rate.
而且，所述循环管道系统与腐蚀介质更新系统的连接管道为一接有止回阀和节流阀的普通直管道，该管道前接腐蚀介质更新系统末端的引出管，后接循环管道系统两支路的分岔起始点。Moreover, the connecting pipeline between the circulating pipeline system and the corrosive medium renewal system is an ordinary straight pipeline connected with a check valve and a throttle valve. Branch start point.
而且，所述电化学测试系统，包括电化学测试管件、三电极测试导线、电化学工作站、主机和显示端，电化学测试管件电极引出端通过三电极测试导线与电化学工作站相连，并由主机和显示端控制测试并记录电化学测量数据。Moreover, the electrochemical test system includes an electrochemical test tube, a three-electrode test lead, an electrochemical workstation, a host and a display terminal, and the electrode lead-out end of the electrochemical test tube is connected to the electrochemical workstation through a three-electrode test lead, and is controlled by the host And the display terminal controls the test and records the electrochemical measurement data.
而且，所述电化学测试管件包括电化学测试管件进口、电化学测试管件出口、工作电极、参比电极和辅助电极，其中辅助电极为一贴壁大面积铂筒，通过聚四氟乙烯旋塞置于进口处，参比电极采用饱和甘汞电极，研究金属材料嵌于有内置铜导线的聚四氟乙烯电极杆顶端作为工作电极。Moreover, the electrochemical test tube includes an electrochemical test tube inlet, an electrochemical test tube outlet, a working electrode, a reference electrode and an auxiliary electrode, wherein the auxiliary electrode is a wall-attached large-area platinum cylinder, which is placed through a polytetrafluoroethylene cock. At the entrance, the reference electrode is a saturated calomel electrode, and the research metal material is embedded in the top of the polytetrafluoroethylene electrode rod with built-in copper wire as the working electrode.
而且，所述电化学测试管件连接在循环管道系统内的电化学测试系统接口处，前端接流量计，后端接失重实验装置。Moreover, the electrochemical test pipe is connected to the interface of the electrochemical test system in the circulation pipeline system, the front end is connected to the flow meter, and the rear end is connected to the weight loss experiment device.
而且，所述失重实验装置包括失重实验装置进口、失重实验装置出口、试片挂板、方形失重盒，研究试片用塑料螺母固定于试片挂板上，试片挂板置于方形失重盒中，方形失重盒顶盖与四壁间以环氧树脂粘接并实现与外界的密封。And, described weight loss test device comprises weight loss test device inlet, weight loss test device outlet, test piece hanging plate, square weight loss box, research test piece is fixed on test piece hanging plate with plastic nut, and test piece hanging plate is placed in square weight loss box Among them, the top cover of the square weightless box and the four walls are bonded with epoxy resin to realize the sealing with the outside world.
而且，所述失重实验装置连接在循环管道系统内的失重实验装置接口处，失重实验装置进口前接电化学测试管件，失重实验装置出口后接循环管道系统上的2号取样口。Moreover, the weight loss test device is connected to the interface of the weight loss test device in the circulation piping system, the inlet of the weight loss test device is connected to the electrochemical test pipe, and the outlet of the weight loss test device is connected to No. 2 sampling port on the circulation piping system.
本实用新型的优点和有益效果为：Advantage and beneficial effect of the present utility model are:
1、本系统的循环管道系统内腐蚀介质可以通过调节排水口来改变循环腐蚀介质的更新速度，且腐蚀介质的更新属于渐变过程，对腐蚀测量尤其是电化学测试系统的冲击性小。1. The corrosive medium in the circulating piping system of this system can change the renewal rate of the circulating corrosive medium by adjusting the outlet, and the renewal of the corrosive medium is a gradual process, which has little impact on the corrosion measurement, especially the electrochemical test system.
2、本系统的循环管道系统中的水泵安装于循环管道上，可以满足研究金属材料表面的腐蚀介质的流动要求，而且通过节流阀便于实现多种流速条件的模拟。2. The water pump in the circulation pipeline system of this system is installed on the circulation pipeline, which can meet the flow requirements of the corrosion medium on the surface of the metal material, and it is convenient to realize the simulation of various flow velocity conditions through the throttle valve.
3、本系统的循环管道系统上串接电化学测试系统和失重实验装置，便于同时采用电化学方法和失重法对流动腐蚀介质下的研究金属材料进行腐蚀监测。3. The circulation pipeline system of this system is connected in series with the electrochemical test system and the weight loss experimental device, which facilitates the corrosion monitoring of the research metal materials under the flowing corrosive medium by using the electrochemical method and the weight loss method at the same time.
4、本实用新型设计科学合理，数据采集和腐蚀监测方便准确，解决了现有腐蚀试验监测系统无法对流动腐蚀介质中的金属材料进行实时电化学腐蚀测量的问题，是一种结合了电化学法和失重法的较为先进的动态腐蚀监测手段，将有利于电化学方法在金属腐蚀研究领域进一步的推广应用。4. The design of the utility model is scientific and reasonable, and the data acquisition and corrosion monitoring are convenient and accurate, which solves the problem that the existing corrosion test monitoring system cannot perform real-time electrochemical corrosion measurement of metal materials in the flowing corrosion medium. The relatively advanced dynamic corrosion monitoring methods of the method and the weight loss method will be conducive to the further popularization and application of electrochemical methods in the field of metal corrosion research.
附图说明Description of drawings
图1为本实用新型的监测系统结构示意图；Fig. 1 is the structural representation of monitoring system of the present utility model;
图2为电化学测试管件的主视图；Fig. 2 is the front view of the electrochemical test tube;
图3为电化学测试管件图2的Ⅰ-Ⅰ截面图；Fig. 3 is the I-I sectional view of Fig. 2 of the electrochemical test tube;
图4为失重实验装置的主视图；Fig. 4 is the front view of weightlessness experiment device;
图5为失重实验装置图4的Ⅰ-Ⅰ截面图。Fig. 5 is a sectional view of I-I in Fig. 4 of the weight loss experimental device.
具体实施方式Detailed ways
下面结合附图并通过具体实施例对本实用新型作进一步详述。需要说明的是，本实用新型的实施例是描述性的，而不是限定性，不应以此限定本实用新型的保护范围。Below in conjunction with accompanying drawing and through specific embodiment the utility model is described in further detail. It should be noted that the embodiments of the present utility model are descriptive rather than restrictive, and should not limit the protection scope of the present utility model.
本实用新型的创新点在于按照图1连接上述两个系统以及电化学测试系统和失重实验装置，此外，还包括电化学测试管件和失重实验装置的结构设计。图2至图5仅为电化学测试管件和失重实验装置的一种实现形式，而图1各系统连接关系亦在本实用新型保护范围之内。The innovation of the utility model lies in connecting the above two systems, the electrochemical test system and the weight loss experimental device according to Fig. 1, and also includes the structural design of the electrochemical test pipe fittings and the weight loss experimental device. Fig. 2 to Fig. 5 are only one realization form of the electrochemical test pipe fitting and the weight loss experiment device, and the connection relationship of each system in Fig. 1 is also within the scope of protection of the utility model.
一种流动腐蚀介质中金属腐蚀行为监测系统，参见图1，由腐蚀介质更新系统、循环管道系统、电化学测试系统、失重实验装置组成，腐蚀介质更新系统通过一连接管道与循环管道系统相连，电化学测试系统和失重实验装置先后串联在循环管道系统内。A metal corrosion behavior monitoring system in a flowing corrosive medium, as shown in Figure 1, is composed of a corrosive medium renewal system, a circulating pipeline system, an electrochemical test system, and a weight loss experimental device. The corrosive medium renewal system is connected to the circulating pipeline system through a connecting pipeline. The electrochemical test system and the weight loss experiment device are successively connected in series in the circulation pipeline system.
所述腐蚀介质更新系统一种实现为大容积储备水箱，水箱侧面设有1号取样口和进水口，水箱底部设有引出管和放空管，引出管上接一更新泵以提供腐蚀介质补给动力，放空管上接一常闭阀门。One implementation of the corrosive medium renewal system is a large-volume storage water tank. The side of the water tank is provided with a No. 1 sampling port and a water inlet. The bottom of the water tank is provided with a lead-out pipe and a vent pipe. A refreshment pump is connected to the lead-out pipe to provide corrosive medium supply. Power, connected to a normally closed valve on the vent pipe.
所述循环管道系统主要包括循环泵、流量计、2号取样口、排水口、杂物过滤器、节流阀、电化学测试系统接口、失重实验装置接口等部件，按水流方向，其中一支路为流量计、电化学测试系统接口、失重实验装置接口、2号取样口、节流阀从前往后用管道依次串接，另一支路为循环泵、杂物过滤器先后用管道依次串接，两支路的分岔起始点位于循环管道系统与腐蚀介质更新系统的连接管道末端，排水口位于两支路汇合点后的直线管道末端，调节其阀门开启度来改变循环管道系统内腐蚀介质更新速率，同时通过调节循环管道系统内的节流阀来控制循环管道系统内的循环流量。The circulation pipeline system mainly includes components such as a circulation pump, a flow meter, No. 2 sampling port, a drain port, a sundry filter, a throttle valve, an interface for an electrochemical test system, and an interface for a weightlessness experiment device. According to the direction of water flow, one of them The flow meter, the interface of the electrochemical test system, the interface of the weight loss experiment device, the No. 2 sampling port, and the throttle valve are connected in series with pipelines from front to back, and the other branch is the circulation pump and the sundries filter. Then, the starting point of the bifurcation of the two branches is located at the end of the connecting pipe between the circulating pipeline system and the corrosive medium renewal system, and the drain is located at the end of the straight line pipeline after the confluence of the two branches. Adjust the opening of the valve to change the internal corrosion of the circulating pipeline system Medium update rate, while controlling the circulation flow in the circulation pipeline system by adjusting the throttle valve in the circulation pipeline system.
所述循环管道系统与腐蚀介质更新系统的连接管道为一接有止回阀和节流阀的普通直管道，该管道前接腐蚀介质更新系统末端的引出管，后接循环管道系统两支路的分岔起始点。The connecting pipeline between the circulation pipeline system and the corrosive medium renewal system is an ordinary straight pipeline connected with a check valve and a throttle valve. The pipeline is connected to the lead-out pipe at the end of the corrosive medium renewal system in front, and then connected to two branches of the circulation pipeline system. starting point of the bifurcation.
所述失重实验装置和电化学测试系统中的电化学测试管件串联于循环管道系统内一支路上，从支路分岔点开始依次是流量计、电化学测试管件、失重实验装置、2号取样口、节流阀。The electrochemical test fittings in the weight loss experiment device and the electrochemical test system are connected in series on a branch in the circulation pipeline system, and starting from the bifurcation point of the branch road, there are flowmeter, electrochemical test fittings, weight loss test device, and No. 2 sampling port, throttle valve.
本实施例中，腐蚀介质更新系统所涉及的水箱、放空管、1号取样口、进水口、更新泵以及循环管道系统所涉及的循环泵、流量计、2号取样口、排水口、杂物过滤器、节流阀等均为现有设备，可根据实际实验需要进行配置，不再赘述。In this embodiment, the water tank, vent pipe, No. 1 sampling port, water inlet, renewal pump involved in the corrosive medium renewal system, and the circulating pump, flow meter, No. 2 sampling port, drain port, miscellaneous The material filter, throttle valve, etc. are all existing equipment, which can be configured according to the actual experimental needs, and will not be repeated here.
电化学测试管件结构见图2、图3。The structure of the electrochemical test tube is shown in Figure 2 and Figure 3.
所述电化学测试管件为一带三电极测试装置的玻璃直管，包括电化学测试管件进口5、电化学测试管件出口6、铂电极引出端3、贴壁大面积铂筒4、工作电极1、参比电极2以及管件托架7，铂电极引出端下部嵌于聚四氟乙烯旋塞8中，并通过内置铜导线与贴壁大面积铂筒连接，工作电极1伸入管件内一端顶部嵌有预制研究金属材料试片，为尽可能减小液接电阻值，参比电极2为斜插入管件的一支饱和甘汞电极，其顶端与研究金属材料制成的工作电极1下端相对，电化学测试管件进口5和电化学测试管件出口6均通过聚四氟乙烯旋塞8上的螺纹或者丝扣与前后管段连接。图2中仅设一个工作电极，在实际需要中可以依实验需要进行增加。The electrochemical test tube is a glass straight tube with a three-electrode test device, including an electrochemical test tube inlet 5, an electrochemical test tube outlet 6, a platinum electrode lead-out 3, a wall-attached large-area platinum cylinder 4, a working electrode 1, The reference electrode 2 and the tube bracket 7, the lower part of the lead-out end of the platinum electrode is embedded in the polytetrafluoroethylene cock 8, and is connected to the wall-adhering large-area platinum cylinder through the built-in copper wire, and the working electrode 1 is inserted into the tube. Prefabricated research metal material test piece, in order to reduce the liquid junction resistance value as much as possible, the reference electrode 2 is a saturated calomel electrode obliquely inserted into the pipe, its top is opposite to the lower end of the working electrode 1 made of research metal material, electrochemical Both the inlet 5 of the test pipe fitting and the outlet 6 of the electrochemical test pipe fitting are connected to the front and rear pipe sections through threads or threads on the polytetrafluoroethylene cock 8 . In Figure 2, only one working electrode is set, which can be increased according to experimental needs in actual needs.
失重实验装置结构见图4、图5。The structure of the weight loss experiment device is shown in Figure 4 and Figure 5.
所述失重实验装置(以矩形金属试片为例)为一内置金属试片挂板的带盖密封方盒，包括失重实验装置进口13、失重实验装置出口14、研究金属材料试片9、试片固定杆10、试片挂板12、失重盒盖11、试片挂板固定槽15，研究金属材料试片9用塑料螺母固定于试片挂板12的试片固定杆10上，试片挂板12置于失重盒内试片挂板固定槽15中，失重盒盖11与四壁间以环氧树脂粘接并实现与外界的密封。图4、图5仅为一个失重实验装置的实现，实际腐蚀实验研究中，可根据需要在循环管道系统的失重实验装置接口处串接或并接多个失重实验装置。The described weight loss test device (taking the rectangular metal test piece as an example) is a sealed square box with a cover with a built-in metal test piece hanging plate, including a weight loss test device inlet 13, a weight loss test device outlet 14, a metal material test piece 9 for research, a test Sheet fixing bar 10, test piece hanging plate 12, weightless box cover 11, test piece hanging plate fixing groove 15, research metal material test piece 9 is fixed on the test piece fixing bar 10 of test piece hanging plate 12 with plastic nut, test piece The hanging plate 12 is placed in the test piece hanging plate fixing groove 15 in the weightless box, and the weightless box cover 11 and the four walls are bonded with epoxy resin to realize sealing with the outside world. Figure 4 and Figure 5 are only the realization of a weight loss experimental device. In the actual corrosion experimental research, multiple weight loss experimental devices can be connected in series or in parallel at the interface of the weight loss experimental device of the circulation pipeline system as required.
以球墨铸铁材料在流动自来水中72h内腐蚀速率测量为例，首先按照图1连接好各系统(一个失重实验盒)，在腐蚀介质更新系统中配制腐蚀介质，实验伊始应开大排水口的阀门开启度，待腐蚀介质充满整个循环管道并运行稳定后，调整排水口使得循环管道内的腐蚀介质更新周期达到预设值，这个过程应同时调节循环管道上的节流阀使得循环管道循环流量稳定(工作电极表面和腐蚀试片表面流速均约为1m/s)，开始实验计时，打开电化学工作站，输入研究金属材料特性和实验条件(25℃下)等基本参数，选择测量方法为稳态极化动电位扫描，设置扫描电位：-0.05V～0.05V(相对于开路电位)，扫描速度：0.1mV/s，待开路电位稳定后开始测量，最后腐蚀速率由测得的腐蚀电流密度利用三参数拟合法计算，每12h进行一次电化学测量，取6次计算平均值得到球墨铸铁材料在自来水中瞬时腐蚀速率为0.096mm/a，这与文献中电化学测试实验结果是基本一致的。Taking the measurement of the corrosion rate of ductile iron materials in flowing tap water within 72 hours as an example, first connect the systems (a weight loss test box) according to Figure 1, and prepare the corrosion medium in the corrosion medium renewal system. At the beginning of the experiment, the valve of the large drain should be opened Opening degree, after the corrosive medium fills the entire circulation pipeline and the operation is stable, adjust the drain outlet so that the corrosive medium update period in the circulation pipeline reaches the preset value. During this process, the throttle valve on the circulation pipeline should be adjusted at the same time to make the circulation flow of the circulation pipeline stable. (The flow velocity on the surface of the working electrode and the surface of the corrosion test piece is about 1m/s), start the experiment timing, open the electrochemical workstation, input the basic parameters such as the characteristics of the metal material and the experimental conditions (at 25°C), and select the measurement method as steady state Polarization potential scanning, set the scanning potential: -0.05V～0.05V (relative to the open circuit potential), scanning speed: 0.1mV/s, start measuring after the open circuit potential is stable, and the final corrosion rate is used by the measured corrosion current density The three-parameter fitting method is used to calculate the electrochemical measurement every 12 hours, and the average value of 6 calculations is obtained to obtain an instantaneous corrosion rate of nodular cast iron material in tap water of 0.096mm/a, which is basically consistent with the experimental results of electrochemical tests in the literature.
经过一段时间的运行后，及时补充腐蚀介质更新系统中的腐蚀介质，失重实验装置每12停机取1片进行失重分析，之后对失重盒进行重新密封并开机，每个腐蚀试片失重量扣除前片的腐蚀失重量作为球墨铸铁试片该时间段的腐蚀失重量，结合腐蚀时间，计算6个时间段的腐蚀速率后取平均值得到球墨铸铁材料在自来水中失重腐蚀速率为0.242mm/a，这与文献中失重实验结果是基本一致的。After a period of operation, timely supplement the corrosive medium to update the corrosive medium in the system. The weight loss test device takes 1 piece every 12 shutdowns for weight loss analysis, and then reseals the weight loss box and starts it up. Each corrosion test piece loses weight before deducting The corrosion loss weight of the sheet is taken as the corrosion loss weight of the nodular cast iron test piece in this time period, combined with the corrosion time, the average value is obtained after calculating the corrosion rates of the 6 time periods to obtain the weight loss corrosion rate of the nodular cast iron material in tap water is 0.242mm/a, This is basically consistent with the results of weightlessness experiments in the literature.
结果表明，本监测系统腐蚀数据获取快捷准确，并可以同时对流动腐蚀介质中的金属材料的电化学腐蚀测量和失重实验研究，是一种较为先进简便的金属材料腐蚀行为监测手段，通过将电化学腐蚀测量手段和失重实验方法结合，拓展了金属材料腐蚀的研究手段。The results show that the corrosion data of this monitoring system can be obtained quickly and accurately, and it can simultaneously measure the electrochemical corrosion and weight loss experiments of metal materials in the flowing corrosion medium. The combination of chemical corrosion measurement method and weight loss experiment method expands the research methods of metal material corrosion.
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| CN104568734A (en) * | 2015-01-14 | 2015-04-29 | 天津大学 | System for monitoring metal corrosion behaviors in flowing corrosive medium |
| CN106404858A (en) * | 2016-08-30 | 2017-02-15 | 中国西电电气股份有限公司 | Test device for researching scaling process of substance in water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104568734A (en) * | 2015-01-14 | 2015-04-29 | 天津大学 | System for monitoring metal corrosion behaviors in flowing corrosive medium |
| CN104568734B (en) * | 2015-01-14 | 2017-06-27 | 天津大学 | Metal Corrosion Behavior Monitoring System in Flowing Corrosion Medium |
| CN105823703B (en) * | 2016-05-24 | 2018-05-01 | 西南石油大学 | It is a kind of to wash away under operating mode the device and method for evaluating inhibitor film integrality |
| CN106404858A (en) * | 2016-08-30 | 2017-02-15 | 中国西电电气股份有限公司 | Test device for researching scaling process of substance in water |
| CN106404858B (en) * | 2016-08-30 | 2018-11-20 | 中国西电电气股份有限公司 | Experimental rig is used in the research of substance scaling process in a kind of water |
| CN107727564A (en) * | 2017-10-24 | 2018-02-23 | 天津大学 | The electrochemical testing device of metal microbiologic(al) corrosion under current system |
| CN108844890A (en) * | 2018-06-13 | 2018-11-20 | 昆明理工大学 | A kind of electrodeposition lead and its alloy anode life assessment method |
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