Deep and shallow sea alternating corrosion environment simulator
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for simulating devices and corrosive environments. It is used in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc. It can solve the problems of accelerated coating aging, high test failure rate, material stress corrosion, etc., and achieve reliable operation and operation. Simple structure principle, real simulation effect
Active Publication Date: 2013-05-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Deep-sea corrosion research mainly includes deep-sea actual sea test and laboratory simulation test. The real-sea simulation experiment can obtain the performance data of materials in the actual deep-sea environment, but it requires a lot of manpower and material resources, high investment, long period, and difficult observation. Especially in the deep sea environment, the test failure rate is high and the sample loss rate is large. Therefore, in recent years, on the basis of the real sea test and the collection of real sea environmental parameters, the laboratory simulation test research has been carried out, and the establishment of The deep-sea environment simulation experiment device is set up, and the si
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Embodiment 1
[0017] In this example, the electrochemical performance test of Al-Zn-In-Mg-Ti (No. 1) and Al-Zn-In-Mg-Ti-Ga-Mn (No. 2) was carried out according to the "Sacrificial Anode Electrochemical Performance Test" Method "GB / T 17848-1999, using the 4-day method test;
[0018] Test pressure: alternating between 3MPa and 4.5MPa, the relationship between the alternating time is as follows image 3 shown;
[0019] Test time: 96 hours;
[0020] Temperature: changes with pressure (simulated deep sea depth);
[0021] Dissolved oxygen: 4ppm;
[0022] Experimental results: as shown in Table 1 and Table 2;
[0023] Table 1 shows the open circuit potential and working potential:
[0024] Numbering
OCP / V
1d / V
2d / V
3d / V
4d / V
1#
-1.128
-1.062
-1.080
-1.004
-1.046
2#
-1.112
-1.067
-1.099
-1.077
-1.057
[0025] Table 2 shows the current efficiency:
[0026] Numbering
Embodiment 2
[0028] In this example, the electrochemical performance test of Al-Zn-In-Mg-Ti (1#) and Al-Zn-In-Mg-Ti-Ga-Mn (2#) was carried out according to the "Sacrificial Anode Electrochemical Performance Test" Method "GB / T 17848-1999, using the 4-day method test;
[0029] Test pressure: 4.5 and 6MPa alternately, the relationship between pressure change and time is as follows Figure 4 shown;
[0030] Temperature: changes with pressure (simulated deep sea depth);
[0031] Test time: 96 hours;
[0032] Dissolved oxygen: 0.6ppm;
[0033] Test results: as shown in Table 3 and Table 4;
[0034] Table 3 shows the open circuit potential and working potential:
[0035] Numbering
OCP / V
1d / V
2d / V
3d / V
4d / V
1#
-1.154
-1.094
-1.201
-1.026
-1.100
2#
-1.166
-1.116
-1.096
-1.036
-1.113
[0036] Table 4 shows the current efficiency:
[0037]
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Abstract
The invention belongs to the technical field of marine corrosion and protection, and relates to a deep and shallow sea alternating corrosion environment simulator. Periodic changes of parameters such as pressure, temperature, dissolved oxygen and pH value are controlled to simulate alternating corrosion environment of sea water at different depths, and realize material performance test in the environment, so as to evaluate various performances of the material in deep and shallow sea alternating corrosion environment. The simulator comprises a pressure alternating system, a salinity regulating system, a pH value regulating system, a temperature control system, a dissolved oxygen regulating system, an auxiliary regulating system, a counterbalance valve, a central control board and a host computer. Medium temperature, medium dissolved oxygen and pH value are adjusted to simulate environmental parameters of deep sea or high pressure; and then a pressure alternating system is employed to conduct pressure change according to a set pressure curve, so as to simulate deep sea alternating environment and evaluate material properties. The simulator has simple structure principle, reliable usage and operation, real stimulating effects, good effects of deep and shallow sea alternating experiments, and strong practicability.
Description
Technical field: [0001] The invention belongs to the technical field of marine corrosion and protection, and relates to a device for simulating alternating corrosion environments in deep and shallow seas. By controlling the periodic changes in parameters such as pressure, temperature, dissolved oxygen and pH value, the corrosion environment of seawater at different depths is simulated, And in this environment, the material performance test can be realized, which can be used to evaluate the various properties of the material in the alternating deep and shallow sea environment. Background technique: [0002] The marine environment is a harsh natural environment for metal materials. Various engineering structures serving in the marine environment will inevitably suffer from seawater corrosion. The deep sea environment has much higher requirements for material structure and functional reliability than land and shallow seas. Compared with the shallow sea environment, when the pre...
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IPC IPC(8): G01N17/00
Inventor 马力张繁闫永贵张海兵
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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