CN109612919A - A method of for detecting galvanic couple type atmospheric corrosion sensor - Google Patents
A method of for detecting galvanic couple type atmospheric corrosion sensor Download PDFInfo
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Abstract
The present invention provides a kind of method for detecting galvanic couple type atmospheric corrosion sensor, the described method includes: step 1): measuring the insulating resistance value between the cathode and anode of the galvanic couple type atmospheric corrosion sensor, tentatively judge whether the galvanic couple type atmospheric corrosion sensor is effective based on the insulating resistance value, if tentatively judge the galvanic couple type atmospheric corrosiveness sensor be it is effective, continue following step 2)；Step 2): under room temperature and a variety of damp conditions, detection and the record of corrosion current value are carried out to the galvanic couple type atmospheric corrosion sensor, and whether within a predetermined range to judge detected corrosion current value, if it is, continuing following step 3)；And step 3): the case where corrosion current value of galvanic couple type atmospheric corrosion sensor described in detection and analysis changes with humidity and changed.
Description
Technical field
The invention belongs to the technical fields of sensor detecting method, and in particular to one kind is for detecting galvanic couple type atmospheric corrosion
The method of sensor.
Background technique
The difference of galvanic couple type atmospheric corrosion sensor according to anode and cathode material corrosion current potential, using atmosphere as corrosive medium,
Corrosion current by detecting yin-yang interpolar realizes the detection of atmospheric corrosiveness, solves tradition and exposes sample detection atmospheric corrosion to the open air
The problems such as sexual cycle length, heavy workload, discontinuous data.
The structure type and cathode and anode material of galvanic couple type atmospheric corrosion sensor can there are many selection, sensor it is sensitive
Property, the influence of precision and consistency to testing result are huge.Currently, both at home and abroad the ununified specification of associated erosion sensor and
Detection method can only can be realized by the comparison of test results long-term with outdoor exposure corrosion sample to corrosion sensor
Evaluation, evaluation cycle are long, it is difficult to meet the requirement of sensor mass production processes.Corrosion sensor requires to change spirit to atmospheric environment
It is quick, precision is high, consistency is good, only meet above-mentioned 3 points of corrosion sensor correctly atmospheric corrosiveness can be made and comment
Valence is just comparable in the evaluation that different regions are made.
Summary of the invention
To solve the above problems, the present invention provides a kind of galvanic couple type atmospheric corrosion sensor detecting method, it can be to electricity
Even type atmospheric corrosion sensor sieve not, makes Fast Evaluation to the quality of galvanic couple type atmospheric corrosion sensor.
Method provided by the present invention for detecting galvanic couple type atmospheric corrosion sensor includes: step 1): described in measurement
Insulating resistance value between the cathode and anode of galvanic couple type atmospheric corrosion sensor, tentatively judges institute based on the insulating resistance value
Whether effective state galvanic couple type atmospheric corrosion sensor, if tentatively judge the galvanic couple type atmospheric corrosiveness sensor be it is effective,
Then continue following step 2)；Step 2): under room temperature and a variety of damp conditions, to the galvanic couple type atmospheric corrosion sensor
Detection and the record of corrosion current value are carried out, and whether within a predetermined range to judge detected corrosion current value, if so,
Then continue following step 3)；And step 3): the corrosion current of galvanic couple type atmospheric corrosion sensor described in detection and analysis
The case where value changes with humidity and is changed.
Preferably, in step 1), using described in multimeter measurement under conditions of room temperature, relative humidity 10%-50%
Insulating resistance value.
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, if the measurement in step 1)
It is greater than or equal to 1K Ω to the insulating resistance value, then tentatively judges that the galvanic couple type atmospheric corrosion sensor is effective.
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, if in step 1), 25
DEG C, under conditions of 30%RH, measuring the insulating resistance value is 80M Ω, then tentatively judges that the galvanic couple type atmospheric corrosion passes
Sensor is effective.
Preferably, in step 2), the galvanic couple type atmospheric corrosion sensor is connected to precision 0.01nA's or more
Electrochemical workstation or pico-ampere table, so as to continuously accurately detect and record the corruption of the galvanic couple type atmospheric corrosion sensor
Lose current value.
Preferably, in the step 2), comprising: step 2a): under conditions of 25 DEG C, 10%-50%RH, detection is rotten
Current density value is lost whether in the first preset range, if it is, continuing following step 2b), otherwise determine the galvanic couple
Type atmospheric corrosion sensor is unqualified；Step 2b): under conditions of 25 DEG C, 50%RH ± 3%RH, detection corrosion current is close
Whether angle value is in the second preset range, if it is, continuing following step 2c), otherwise determine that the galvanic couple type atmosphere is rotten
It is unqualified for losing sensor；Step 2c): under conditions of 25 DEG C, 80%RH ± 3%RH, whether detection corrosion electric current density value
In third preset range, if it is, continuing following step 2d), otherwise determine the galvanic couple type atmospheric corrosion sensor
It is unqualified；And step 2d): under conditions of 25 DEG C, 98%RH ± 3%RH, whether detection corrosion electric current density value is the
Four preset ranges otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified if it is, continuing step 3).
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, first preset range is
0.1nA/cm2Hereinafter, second preset range is 0.1-1nA/cm2, the third preset range is 5-20nA/cm2, described
4th preset range is 300-800nA/cm2。
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of aluminum, first preset range is
0.02nA/cm2Hereinafter, second preset range is 0.02-0.2nA/cm2, the third preset range is 1-3nA/cm2, institute
Stating the 4th preset range is 50-130nA/cm2。
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of copper, first preset range is
0.05nA/cm2Hereinafter, second preset range is 0.05-1nA/cm2, the third preset range is 2-10nA/cm2, institute
Stating the 4th preset range is 200-600nA/cm2。
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is formed from steel, first preset range is
3nA/cm2Hereinafter, second preset range is 3-25nA/cm2, the third preset range is 100-500nA/cm2, described
4th preset range is 6000-20000nA/cm2。
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, if the step 2) the step of
In 2b), under conditions of 25 DEG C, 50%RH ± 3%RH, detect that corrosion electric current density value is 0.5nA/cm2, then continue
Step 2c), otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified.
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, if the step 2) the step of
In 2c), under conditions of 25 DEG C, 80%RH ± 3%RH, detect that corrosion electric current density value is 10nA/cm2, then continue
Step 2d), otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified.
Preferably, when the anode of the galvanic couple type atmospheric corrosion sensor is made of zinc, if the step 2) the step of
In 2d), under conditions of 25 DEG C, 98%RH ± 3%RH, detect that corrosion electric current density value is 400nA/cm2, then continue
Step 3) otherwise determines that the galvanic couple type atmospheric corrosion sensor is unqualified.
Preferably, in step 2), the galvanic couple type atmospheric corrosion sensor is corroded in temperature and humidity alternation case
Current value Density Detection, the temperature and humidity alternation case can provide required various temperature and damp condition.
Preferably, the temperature and humidity alternation case to the precision of humid control within 5%, to the control precision of temperature ±
1.5℃。
Preferably, in step 3), the corrosion current value of detected galvanic couple type atmospheric corrosion sensor becomes with humidity
The case where changing and changing include the corrosion current value whether with humidity increase and increase or with humidity reduce and reduce and it is described
Whether the response that corrosion current value changes humidity is timely.
Preferably, in the step 3), by placing high-precision temperature close to the galvanic couple type atmospheric corrosion sensor
Humidity sensor is synchronously carried out humidity inspection while detecting the corrosion current value of the galvanic couple type atmospheric corrosion sensor
It surveys, based on detected corrosion current value and humidity to the corrosion current value of the galvanic couple type atmospheric corrosion sensor with humidity
The case where changing and changing is analyzed and is judged, wherein the relationship of the corrosion current value and the humidity are as follows: at 25 DEG C
Under, lg i=a+ (b × RH), wherein i is electric current, unit nA；A and b is the sun with the galvanic couple type atmospheric corrosion sensor
The relevant constant of pole material therefor, when anode material therefor is zinc, aluminium, copper or steel, corresponding a and b is as shown in the table,
| Material | a | b |
| Zinc | -1.650 | 0.0333 |
| Aluminium | -4.125 | 0.0625 |
| Copper | -4.377 | 0.0644 |
| Steel | -0.659 | 0.0392 |
；RH is the percentage of relative humidity.
Preferably, when the anode material of the galvanic couple type atmospheric corrosion sensor is zinc, corrosion current changes humidity
When response time is no more than 1s, the response for being judged as that the galvanic couple type atmospheric corrosion sensor changes humidity is timely, and then sentences
The fixed galvanic couple type atmospheric corrosion sensor is qualification.
Galvanic couple type atmospheric corrosion is passed the beneficial effects of the present invention are: can be fast implemented under controlled the same terms
The batch detection of sensor quality, it is ensured that sensitivity, precision and the consistency of corrosion sensor, to further ensure utilization
Result is accurate credible when the galvanic couple type atmospheric corrosion sensor of the application detects atmospheric corrosiveness, meets in difference
The comparativity requirement of regional corrosion evaluation result.
Detailed description of the invention
Fig. 1 is the process of the method for one of specific embodiment of the invention detection galvanic couple type atmospheric corrosion sensor
Figure.
Fig. 2 is the data result curve graph detected to the atmospheric corrosion sensor in one embodiment of the invention.
Specific embodiment
Below in conjunction with attached drawing, description of specific embodiments of the present invention.
Method for detecting galvanic couple type atmospheric corrosion sensor of the invention includes: step S1: measurement galvanic couple type atmosphere
Insulating resistance value between the cathode and anode of corrosion sensor tentatively judges that galvanic couple type atmospheric corrosion passes based on insulating resistance value
Whether sensor effective, if tentatively judge galvanic couple type atmospheric corrosiveness sensor be it is effective, continue following step S2；Step
Rapid S2: under room temperature and a variety of damp conditions, the corrosion current value of detection and record galvanic couple type atmospheric corrosion sensor, and judge
Detected corrosion current value whether within a predetermined range, if it is, continuing following step S3；And step S3:
The case where corrosion current of detection galvanic couple type atmospheric corrosion sensor changes with humidity and is changed.
A kind of method for detecting galvanic couple type atmospheric corrosion sensor in the specific embodiment of the invention is shown in Fig. 1
Flow chart.Wherein, big using multimeter measurement galvanic couple type under conditions of room temperature, relative humidity 10%-50% in step S1
Insulating resistance value between the cathode and anode of gas corrosion sensor.Wherein, in step sl, if galvanic couple type atmospheric corrosion passes
Insulating resistance value between the cathode and anode of sensor is greater than or equal to 1K Ω, then tentatively judges that the galvanic couple type atmospheric corrosion senses
Device is effective.Preferably, in step S1, under conditions of 25 DEG C, 30%RH, if the cathode of galvanic couple type atmospheric corrosion sensor
Insulating resistance value between anode is 80M Ω, then tentatively judges that the galvanic couple type atmospheric corrosion sensor is effective.
In step s 2, galvanic couple type atmospheric corrosion sensor is connected to precision in the electrochemical workstation of 0.01nA or more
Or pico-ampere table, so as to the continuous corrosion current value for accurately detecting and recording galvanic couple type atmospheric corrosion sensor.
As shown in Figure 1, step S2 further comprises step S2a, S2b, S2c and S2d, in which:
In step S2a: under conditions of 25 DEG C, 10%-50%RH, whether detection corrosion electric current density value is predetermined first
Otherwise range determines that the galvanic couple type atmospheric corrosion sensor is unqualified if it is, continuing following step S2b；
Step S2b: under conditions of 25 DEG C, 50%RH ± 3%RH, whether detection corrosion electric current density value is predetermined second
Otherwise range determines that the galvanic couple type atmospheric corrosion sensor is unqualified if it is, continuing following step S2c；
Step S2c: under conditions of 25 DEG C, 80%RH ± 3%RH, whether detection corrosion electric current density value is predetermined in third
Otherwise range determines that the galvanic couple type atmospheric corrosion sensor is unqualified if it is, continuing following step S2d；
Step S2d: under conditions of 25 DEG C, 98%RH ± 3%RH, whether detection corrosion electric current density value is predetermined the 4th
Otherwise range determines that the galvanic couple type atmospheric corrosion sensor is unqualified if it is, continuing step S3.
When the anode of galvanic couple type atmospheric corrosion sensor is made of zinc, above-mentioned first preset range is 0.1nA/cm2With
Under, above-mentioned second preset range is 0.1-1nA/cm2, above-mentioned third preset range is 5-20nA/cm2, above-mentioned 4th preset range
For 300-800nA/cm2。
When the anode of galvanic couple type atmospheric corrosion sensor is made of aluminum, above-mentioned first preset range is 0.02nA/cm2With
Under, above-mentioned second preset range is 0.02-0.2nA/cm2, above-mentioned third preset range is 1-3nA/cm2, above-mentioned 4th predetermined model
It encloses for 50-130nA/cm2。
Preferably, in the step S2b of step S2, under conditions of 25 DEG C, 50%RH ± 3%RH, if detecting corruption
Erosion current density value is first predetermined value, then continues step S2c and otherwise determine that galvanic couple type atmospheric corrosion sensor is not conform to
Lattice.
Preferably, in the step S2c of step S2, under conditions of 25 DEG C, 80%RH ± 3%RH, if detecting corruption
Erosion current density value is second predetermined value, then continues step S2d, otherwise determines that galvanic couple type atmospheric corrosion sensor is not conform to
Lattice.
Preferably, in the step S2d of step S2, under conditions of 25 DEG C, 98%RH ± 3%RH, if detecting corruption
Erosion current density value is third predetermined value, then continues step S3, otherwise determine that the galvanic couple type atmospheric corrosion sensor is
It is unqualified.
Preferably, in step s 2, the galvanic couple type atmospheric corrosion sensor is corroded in temperature and humidity alternation case
Current value Density Detection, the temperature and humidity alternation case can provide required various temperature and damp condition.Preferably, the temperature
Humidity alternation case to the control precision of humidity within 5%, to the control precision of temperature at ± 1.5 DEG C.
Preferably, in step s3, the corrosion current value of detected galvanic couple type atmospheric corrosion sensor becomes with humidity
The case where changing and changing includes whether corrosion current value increases with humidity and increase or reduce and corrode with humidity reduction
Whether the response that current value changes humidity is timely.
In the step S3, by placing high-precision temperature and humidity sensing close to the galvanic couple type atmospheric corrosion sensor
Device utilizes the high-accuracy temperature-humidity sensor while detecting the corrosion current value of the galvanic couple type atmospheric corrosion sensor
Humidity is synchronously detected, analyzed based on detected corrosion current value and humidity and judges that corrosion current value changes with humidity
And the case where changing.At 25 DEG C, the functional relation of corrosion current value and humidity are as follows: lg i=a+ (b × RH), wherein i is electricity
Stream, unit nA；A and b is constant relevant to the anode material therefor of the galvanic couple type atmospheric corrosion sensor, when anode institute
Corresponding a and b is as shown in table 1 below when with material being zinc, aluminium, copper or steel；RH is the percentage of relative humidity.
Table 1
| Material | a | b |
| Zinc | -1.650 | 0.0333 |
| Aluminium | -4.125 | 0.0625 |
| Copper | -4.377 | 0.0644 |
| Steel | -0.659 | 0.0392 |
In step 3), when the corrosion current value of galvanic couple type atmospheric corrosion sensor does not surpass the response time that humidity changes
When crossing 1s, the response for being judged as that the galvanic couple type atmospheric corrosion sensor changes humidity is timely, and then determines the galvanic couple type
Atmospheric corrosion sensor is qualification.
In order to rapidly carry out batch detection to galvanic couple type atmospheric corrosion sensor, stable and consistent preferably can provided
Temperature and humidity conditions temperature and humidity alternation case in implement the application detection method.
Fig. 1, which is shown, detects above-mentioned galvanic couple type atmospheric corrosion sensor under the damp condition that temperature and humidity alternation case provides
Detailed process.
As shown in Figure 1, firstly, being detected to the insulating resistance value of galvanic couple type atmospheric corrosion sensor to be detected, base
Tentatively judge whether galvanic couple type atmospheric corrosion sensor is effective in detected insulating resistance value.In laboratory environment, that is, 25
DEG C, under 30%RH, use the insulation resistance between the anode and cathode of multimeter detection galvanic couple type atmospheric corrosion sensor.Specifically
Ground, the anode of the anode connection galvanic couple type atmospheric corrosion sensor of multimeter, another pole of multimeter connects galvanic couple type atmosphere
The cathode of corrosion sensor, the insulating resistance value detected are 80M Ω.
Next, in temperature and humidity alternation case in different humidity under the conditions of detect above-mentioned galvanic couple type atmospheric corrosion sensor
Corrosion current.Temperature and humidity Alternating Test case can generate different temperature and humidity environment, for changing atmospheric corrosiveness.Due to relatively wet
Degree is affected to atmospheric corrosiveness, therefore, the temperature in temperature and humidity alternation case is stablized at 25 DEG C, by adjusting humidity realization
The variation of atmospheric corrosiveness.Temperature and humidity alternation case generally provides damp condition by way of shallow water disk, steam or water spray,
There may be the non-uniform state of humidity in cabinet, and the humidity in galvanic couple type atmospheric corrosion sensors towards ambient is extremely clever
Quick, in addition the temperature and humidity precision of Alternating Test case is 5%, so placing at the position close to galvanic couple type atmospheric corrosion sensor
Precision can to 1% high-accuracy temperature-humidity sensor.
Galvanic couple type atmospheric corrosion sensor to be detected is placed in above-mentioned temperature and humidity alternation case, while galvanic couple type atmosphere
The lead at corrosion sensor the two poles of the earth and precision 0.01nA or more high precision electro flow detection device such as electrochemical workstation or
The connection such as pico-ampere table, to start to be corroded after the booting of temperature and humidity alternation case stable 1h or more, preferably stable 2h
The detection of electric current.Electrochemical workstation suitable for the application preferably has high quality high stability, high-resolution, high sampling speed
Rate can be directly used for the steady-state current measurement on ultramicroelectrode, and connect with micro current amplifier and shielded box, can measure 1pA
Or lower electric current.
Next, adjustment temperature and humidity alternation case inner space makes humidity in 10%-50%RH, stablize to temperature and humidity
After maintaining half an hour, the corrosion electric current density value of galvanic couple type atmospheric corrosion sensor is detected, if detecting that corrosion current is close
Angle value is in 0.1nA/cm2Hereinafter, then method continues to next step, the galvanic couple type atmospheric corrosion sensor is otherwise judged
To be unqualified, detection process terminates.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 50%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion current using electrochemical workstation or pico-ampere table detection galvanic couple type atmospheric corrosion sensor is close
Angle value, if detecting corrosion electric current density value in 0.1-1nA/cm2Range, then method continues to next step,
Otherwise determine the galvanic couple type atmospheric corrosion sensor be it is unqualified, detection process terminates.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 80%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion current using electrochemical workstation or pico-ampere table detection galvanic couple type atmospheric corrosion sensor is close
Angle value, if detecting corrosion electric current density value in 5-20nA/cm2, then method continues to next step, otherwise determines
The galvanic couple type atmospheric corrosion sensor be it is unqualified, detection process terminates.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 98%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion current using electrochemical workstation or pico-ampere table detection galvanic couple type atmospheric corrosion sensor is close
Angle value, if detecting corrosion electric current density value in 300-800nA/cm2, then method continues to next step, otherwise
Determine the galvanic couple type atmospheric corrosion sensor be it is unqualified, detection process terminates.
As described above, close to being placed with height at the position of galvanic couple type atmospheric corrosion sensor to be detected in temperature and humidity alternation case
Precision Temperature Humidity Sensor, so as to detect and record galvanic couple type atmospheric corrosion sensor corrosion current value while,
The humidity data of galvanic couple type atmospheric corrosion sensor local environment is monitored and recorded using high-accuracy temperature-humidity sensor.Based on institute
The corrosion current Value Data and high-accuracy temperature-humidity sensor for the galvanic couple type atmospheric corrosion sensor for detecting and being recorded monitor
With the humidity data being recorded, it can analyze and judge that the corrosion current of galvanic couple type atmospheric corrosion sensor changes with humidity and become
The response condition that the case where change and corrosion current change humidity.Theoretically, qualified galvanic couple type atmospheric corrosion sensor
Corrosion current value should increase as humidity increases, and reduce and reduce, and trackability is good, response speed is preferably more than 1s.
The technical solution of the application is further described below by way of two specific embodiments.
Embodiment 1
In the present embodiment, the anode of galvanic couple type atmospheric corrosion sensor is made of metallic zinc, and cathode is made of metal platinum.
The structure of the galvanic couple type atmospheric corrosion sensor is the alternate form that cathode and anode are alternately arranged, and cathode and anode are respectively set
There is lead.Electrode area is 10cm2。
Firstly, using the anode and yin of the above-mentioned galvanic couple type atmospheric corrosion sensor of multimeter detection at 25 DEG C, 30%RH
Insulation resistance between pole.The anode of the anode connection galvanic couple type atmospheric corrosion sensor of multimeter, another pole of multimeter connects
The cathode for connecing galvanic couple type atmospheric corrosion sensor detects that resistance value is 80M Ω, tentatively judges that the galvanic couple type atmospheric corrosion senses
Device is effective.
Next, to being tentatively judged as that effective galvanic couple type atmospheric corrosion passes in temperature and humidity alternation case as described above
Sensor carries out corrosion current detection.Above-mentioned galvanic couple type atmospheric corrosion sensor to be detected is put into temperature and humidity alternation case, electricity
The electrochemical workstation of the lead at even type atmospheric corrosion sensor the two poles of the earth and precision in 0.01nA or more connects, while close to electricity
A high-precision Temperature Humidity Sensor is placed at the position of even type atmospheric corrosion sensor.It is switched on and runs to temperature and humidity alternation case
Stablize 2h to start to carry out the detection of corrosion current later.
The corrosion current value of galvanic couple type atmospheric corrosion sensor under following 25 DEG C of detection, 10%-50%RH.It adjusts warm and humid
Degree alternation case inner space makes humidity in 10%-50%RH, stablizes after maintaining half an hour to temperature and humidity, detects galvanic couple
The corrosion electric current density value of type atmospheric corrosion sensor detects corrosion electric current density value in 0.1nA/cm2Hereinafter, method continues
Proceed to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 50%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion electric current density value of electrochemical workstation detection galvanic couple type atmospheric corrosion sensor, detection are utilized
It is 0.5nA/cm to corrosion electric current density value2, method continues to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 80%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion electric current density value of electrochemical workstation detection galvanic couple type atmospheric corrosion sensor, detection are utilized
It is 10nA/cm to corrosion electric current density value2, method continues to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 98%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion current using electrochemical workstation or pico-ampere table detection galvanic couple type atmospheric corrosion sensor is close
Angle value detects corrosion electric current density value in 400nA/cm2, method continues to next step.
Under the conditions of above various while detection corrosion current, it is placed on the temperature and humidity of temperature and humidity alternation case inner space
Sensor is synchronously detected and is recorded to humidity.Corruption based on the galvanic couple type atmospheric corrosion sensor for detecting and being recorded
The humidity data that erosion electric current Value Data and high-accuracy temperature-humidity sensor are monitored and be recorded, analyzes and judges galvanic couple type atmosphere
The case where corrosion current of corrosion sensor changes with humidity and changed and the response condition that corrosion current changes humidity.
It is shown in Fig. 2 the result shows that, in the present embodiment the corrosion current of galvanic couple type atmospheric corrosion sensor detected with
The increase of humidity and increase, and trackability is good, and the response time that corrosion current changes humidity during the test is no more than
1s.In relative humidity 50%, the corrosion current value detected is 5nA, and corresponding corrosion electric current density value is 0.5nA/cm2,
Corrosion electric current density value when relative humidity 80% is 10nA/cm2, corrosion electric current density value when relative humidity 98% is
400nA/cm2, corrosion electric current density value is detected within a predetermined range under each damp condition, therefore, determines above-mentioned galvanic couple
Type atmospheric corrosion sensor is qualification.
Embodiment 2
In the present embodiment, the anode of galvanic couple type atmospheric corrosion sensor is made of metallic aluminium, and cathode is made of metallic gold.
The structure of the galvanic couple type atmospheric corrosion sensor is the alternate form that cathode and anode are alternately arranged, and cathode and anode are respectively set
There is lead.Electrode area is 10cm2。
Firstly, at 25 DEG C, 30%RH, using multimeter detection galvanic couple type atmospheric corrosion sensor anode and cathode it
Between insulation resistance.The anode of the anode connection galvanic couple type atmospheric corrosion sensor of multimeter, another pole of multimeter connects electricity
The cathode of even type atmospheric corrosion sensor detects that resistance value is 20M Ω, tentatively judges that the galvanic couple type atmospheric corrosion sensor is
Effectively.
Next, to being tentatively judged as that effective galvanic couple type atmospheric corrosion passes in temperature and humidity alternation case as described above
Sensor carries out corrosion current detection.Above-mentioned galvanic couple type atmospheric corrosion sensor to be detected is put into temperature and humidity alternation case, electricity
The electrochemical workstation of the lead at even type atmospheric corrosion sensor the two poles of the earth and precision in 0.01nA or more connects, while close to electricity
A high-precision Temperature Humidity Sensor is placed at the position of even type atmospheric corrosion sensor.It is switched on and runs to temperature and humidity alternation case
Stablize 2h to start to carry out the detection of corrosion current later.
The corrosion current of galvanic couple type atmospheric corrosion sensor under following 25 DEG C of detection, 10%-50%RH.Adjust temperature and humidity
Alternation case inner space makes humidity in 10%-50%RH, stablizes after maintaining half an hour to temperature and humidity, detects galvanic couple type
The corrosion electric current density value of atmospheric corrosion sensor.Detect corrosion electric current density value in 0.02nA/cm2Hereinafter, method continues
Proceed to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 50%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion electric current density value of electrochemical workstation detection galvanic couple type atmospheric corrosion sensor, detection are utilized
It is 0.1nA/cm to corrosion electric current density value2, method continues to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 80%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion electric current density value of electrochemical workstation detection galvanic couple type atmospheric corrosion sensor, detection are utilized
It is 2nA/cm to corrosion electric current density value2, method continues to next step.
Next, the humidity for increasing temperature and humidity alternation case inner space is stablized to 98%RH ± 3%RH to temperature and humidity
After maintaining half an hour, the corrosion current using electrochemical workstation or pico-ampere table detection galvanic couple type atmospheric corrosion sensor is close
Angle value detects corrosion electric current density value in 80nA/cm2, method continues to next step.
Under the conditions of above various while detection corrosion current, it is placed on the temperature and humidity of temperature and humidity alternation case inner space
Sensor is synchronously detected and is recorded to humidity.Corruption based on the galvanic couple type atmospheric corrosion sensor for detecting and being recorded
The humidity data that erosion electric current Value Data and high-accuracy temperature-humidity sensor are monitored and be recorded, analyzes and judges galvanic couple type atmosphere
The case where corrosion current of corrosion sensor changes with humidity and changed and the response condition that corrosion current changes humidity.This
The corrosion current of galvanic couple type atmospheric corrosion sensor detected increases with the increase of humidity in embodiment, and trackability
Good, corrosion current is no more than 1s to the response time that humidity changes during the test.Electricity is detected under each relative humidities
Current density value within a predetermined range, therefore, determines that above-mentioned galvanic couple type atmospheric corrosion sensor is qualification.
Figure of description is combined to be described in detail and describe the embodiment of the present invention above, but art technology
Personnel are it should be understood that above embodiments are only the preferred embodiments of the invention, and explanation is intended merely to help reader more in detail
Spirit of that invention is understood well, and it is not intended to limit the protection scope of the present invention, on the contrary, any based on spirit of the invention
Made any improvement or modification should all be fallen within the scope and spirit of the invention.
Claims (18)
1. a kind of method for detecting galvanic couple type atmospheric corrosion sensor, which comprises
Step 1): measuring the insulating resistance value between the cathode and anode of the galvanic couple type atmospheric corrosion sensor, based on described
Insulating resistance value tentatively judges whether the galvanic couple type atmospheric corrosion sensor is effective, if tentatively judging the galvanic couple type atmosphere
Corrosivity sensor be it is effective, then continue following step 2)；
Step 2): under room temperature and a variety of damp conditions, corrosion current value is carried out to the galvanic couple type atmospheric corrosion sensor
Detection and record, and whether within a predetermined range to judge detected corrosion current value, if it is, continuing following steps
It is rapid 3)；And
Step 3): the corrosion current value of galvanic couple type atmospheric corrosion sensor described in detection and analysis changes with humidity and the feelings of variation
Condition.
2. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: in step
1) in, the insulating resistance value is measured using multimeter under conditions of room temperature, relative humidity 10%-50%.
3. the method according to claim 2 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: when described
When the anode of galvanic couple type atmospheric corrosion sensor is made of zinc, if measured in step 1) insulating resistance value be greater than or
Equal to 1K Ω, then tentatively judge that the galvanic couple type atmospheric corrosion sensor is effective.
4. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: when described
When the anode of galvanic couple type atmospheric corrosion sensor is made of zinc, if under conditions of 25 DEG C, 30%RH, surveyed in step 1)
Measuring the insulating resistance value is 80M Ω, then tentatively judges that the galvanic couple type atmospheric corrosion sensor is effective.
5. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: in step
2) in, the galvanic couple type atmospheric corrosion sensor is connected to precision in the electrochemical workstation or pico-ampere table of 0.01nA or more,
So as to continuously accurately detect and record the corrosion current value of the galvanic couple type atmospheric corrosion sensor.
6. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: described
In step 2), comprising:
Step 2a): under conditions of 25 DEG C, 10%-50%RH, detection corrosion electric current density value whether in the first preset range,
If it is, continuing following step 2b), otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified；
Step 2b): under conditions of 25 DEG C, 50%RH ± 3%RH, whether corrosion electric current density value is detected in the second predetermined model
Enclose, if it is, continuing following step 2c), otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified；
Step 2c): under conditions of 25 DEG C, 80%RH ± 3%RH, whether corrosion electric current density value is detected in the predetermined model of third
Enclose, if it is, continuing following step 2d), otherwise determine that the galvanic couple type atmospheric corrosion sensor is unqualified；
Step 2d): under conditions of 25 DEG C, 98%RH ± 3%RH, whether corrosion electric current density value is detected in the 4th predetermined model
It encloses, if it is, continuing step 3), otherwise determines that the galvanic couple type atmospheric corrosion sensor is unqualified.
7. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: when described
When the anode of galvanic couple type atmospheric corrosion sensor is made of zinc, first preset range is 0.1nA/cm2Hereinafter, described second
Preset range is 0.1-1nA/cm2, the third preset range is 5-20nA/cm2, the 4th preset range is 300-
800nA/cm2。
8. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: when described
When the anode of galvanic couple type atmospheric corrosion sensor is made of aluminum, first preset range is 0.02nA/cm2Hereinafter, described
Two preset ranges are 0.02-0.2nA/cm2, the third preset range is 1-3nA/cm2, the 4th preset range is 50-
130nA/cm2。
9. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: when described
When the anode of galvanic couple type atmospheric corrosion sensor is made of copper, first preset range is 0.05nA/cm2Hereinafter, described
Two preset ranges are 0.05-1nA/cm2, the third preset range is 2-10nA/cm2, the 4th preset range is 200-
600nA/cm2。
10. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: work as institute
When stating the anode of galvanic couple type atmospheric corrosion sensor and being formed from steel, first preset range is 3nA/cm2Hereinafter, described second
Preset range is 3-25nA/cm2, the third preset range is 100-500nA/cm2, the 4th preset range is 6000-
20000nA/cm2。
11. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: work as institute
State galvanic couple type atmospheric corrosion sensor anode it is made of zinc when, if in the step 2b of step 2)) in, in 25 DEG C, 50%RH
Under conditions of ± 3%RH, detect that corrosion electric current density value is 0.5nA/cm2, then continue step 2c), otherwise determine institute
It is unqualified for stating galvanic couple type atmospheric corrosion sensor.
12. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: work as institute
State galvanic couple type atmospheric corrosion sensor anode it is made of zinc when, if in the step 2c of step 2)) in, in 25 DEG C, 80%RH
Under conditions of ± 3%RH, detect that corrosion electric current density value is 10nA/cm2, then continue step 2d), otherwise described in judgement
Galvanic couple type atmospheric corrosion sensor is unqualified.
13. the method according to claim 6 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: work as institute
State galvanic couple type atmospheric corrosion sensor anode it is made of zinc when, if in the step 2d of step 2)) in, in 25 DEG C, 98%RH
Under conditions of ± 3%RH, detect that corrosion electric current density value is 400nA/cm2, then continue step 3), otherwise described in judgement
Galvanic couple type atmospheric corrosion sensor is unqualified.
14. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: in step
It is rapid 2) in, in temperature and humidity alternation case to the galvanic couple type atmospheric corrosion sensor carry out corrosion current value Density Detection, it is described
Temperature and humidity alternation case can provide required various temperature and damp condition.
15. the method according to claim 14 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: described
Temperature and humidity alternation case to the precision of humid control within 5%, to temperature controlled precision at ± 1.5 DEG C.
16. the method according to claim 1 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: described
The corrosion current value of galvanic couple type atmospheric corrosion sensor with humidity change and the case where changing include the corrosion current value whether
Increase with humidity and increases or reduce and reduce and whether the response that changes to humidity of the corrosion current is timely with humidity.
17. the method for being used to detect galvanic couple type atmospheric corrosion sensor according to claim 1 or described in 16, it is characterised in that:
In the step 3), by placing high-precision Temperature Humidity Sensor close to the galvanic couple type atmospheric corrosion sensor, examining
It is synchronously carried out Humidity Detection while surveying the corrosion current value of the galvanic couple type atmospheric corrosion sensor, based on detected
The case where corrosion current value and humidity change with humidity and are changed to the corrosion current value of the galvanic couple type atmospheric corrosion sensor
It is analyzed and is judged, wherein the relationship of the corrosion current value and the humidity are as follows:
At 25 DEG C,
Lg i=a+ (b × RH)
Wherein, i is electric current, unit nA；A and b is relevant to the anode material of the galvanic couple type atmospheric corrosion sensor normal
Number, when anode material therefor is zinc, aluminium, copper or steel, corresponding a and b is as shown in the table,
；RH is the percentage of relative humidity.
18. the method according to claim 16 for detecting galvanic couple type atmospheric corrosion sensor, it is characterised in that: work as institute
The anode material for stating galvanic couple type atmospheric corrosion sensor is zinc, when corrosion current is no more than 1s to the response time that humidity changes,
The response for being judged as that the galvanic couple type atmospheric corrosion sensor changes humidity is timely, and then determines the galvanic couple type atmospheric corrosion
Sensor is qualification.
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