CN109900630A - It is a kind of to evaluate complicated metal pair to the test device and method of galvanic corrosion - Google Patents
It is a kind of to evaluate complicated metal pair to the test device and method of galvanic corrosion Download PDFInfo
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Abstract
The invention discloses a kind of complicated metal pairs of evaluation to the test device and method of galvanic corrosion, belongs to galvanic corrosion detection method technical field.Test device includes Multi-channel galvanic corrosion tester, sample to be tested and corrosive medium.Multi-channel galvanic corrosion tester can monitor the Galvanic Current and current potential of two kinds and the above metal pair pair simultaneously.Sample to be tested is the array electrode that various metals assemble, it can be coupled metal arrangements mode by adjusting the position change of different metal array electrode in sample to be tested, the coupling rate of different anode and cathode area ratios can be measured by choosing the quantity of wire and position in every kind of metallic array electrode.Fast Evaluation can be carried out to the coupling rate under various geometric parameters and corrosive environment to complicated metal pair using the present invention, provide theoretical foundation for the galvanic corrosion prediction in practical application in industry.
Description
Technical field
The present invention relates to galvanic corrosion detection method technical fields, and in particular to a kind of complicated metal pair of evaluation is rotten to galvanic couple
The test device and method of erosion.
Background technique
Galvanic corrosion is that one kind is widely present and endangers huge etch state.Currently, paying close attention at most is bimetallic electricity
Thermogalvanic corrision problem, but be actually inevitably present three kinds of metals or more couples, and can generate complicated metal pair pair
Galvanic corrosion.The influence factor of galvanic corrosion has very much, including couple material self-characteristic, coupling geometrical factor and environment because
Element.There are two existing common galvanic corrosion evaluation methods, GB/T 15748-2013 marine metal material galvanizing corrosion test side
Method and HB 5477-91 different metal Galvanic Current measuring method, the evaluation time of two methods are respectively that 15 days and 20 are small
When.Referring to both standards, the single experiment period is just very long, if to evaluate complicated metal pair to different anode and cathode area ratios,
Period needed for galvanic corrosion under different corrosive environments will be longer.Therefore, it is badly in need of a kind of energy Fast Evaluation complexity metal pair pair
The test method of galvanic corrosion.
Array electrode can more quickly study the galvanic corrosion problem of different anode and cathode area ratios, different spacing samples,
In conjunction with multiple channel test method, it can be obviously improved the evaluation efficiency of galvanic corrosion, it is quickly rotten to the galvanic couple of complicated metal pair pair
Erosion rate measures.
Summary of the invention
In order to overcome the existing galvanic corrosion test method test period long, especially for the galvanic corrosion of complicated metal pair pair
Measurement problem more protrudes this status, and it is an object of that present invention to provide a kind of tests for evaluating complicated metal pair to galvanic corrosion
Device and method are combined using array electrode and Multi-channel galvanic corrosion tester, being capable of Fast Evaluation complexity metal pair pair
Galvanic corrosion situation.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of to evaluate complicated metal pair to the test device of galvanic corrosion, which includes Multi-channel galvanic corrosion test
Instrument, test sample and corrosive medium；Wherein:
The Multi-channel galvanic corrosion tester is used for while monitoring each metal when the coupling of two or more metal
Galvanic Current and coupling potential；The port number of the Multi-channel galvanic corrosion tester is at least 4 channels, and number of channels is more
The sample size once tested is more.
The test sample is that composed large scale array electrode is integrated by multiple metal electrodes, described to be measured
Sample is placed in corrosive medium；The large scale array electrode is made of two or more array electrode units, often
A array electrode unit is formed by multiple regularly arranged same metal electrode packages；Metal electricity in different array electrode units
Pole material is different.
The array electrode unit is rectangle, sample of the array electrode unit of every kind of metal on length and width direction
Product quantity (metal electrode quantity) can be adjusted as needed.
The array electrode unit includes multiple wires for being connected with copper conductor and insulation template, is connected with the metal of copper conductor
Silk respectively insertion insulation template in, using resin by be connected with copper conductor wire and insulate template package curing together with after,
Obtain the rectangular array electrode unit of this kind of metal.
The cross section of the wire is circle or rectangular, and the diameter or side length of cross section are 1-5 millimeters, metal filament length
2-5 centimetres, 0.3-2 millimeters of silk material spacing of degree；The material of the wire is the various metals being related in practical Service Environment,
Such as iron, aluminium, copper, titanium, magnesium.
The test sample assigns into group in square insulating baffle by the array electrode unit of two or more metal
It fills, can arbitrarily adjust the position of each array electrode unit.
The corrosive medium is contained in heatable container, which, which is put into constant temperature water bath, keeps temperature needed for test
Degree.The corrosive medium can be selected according to the corrosive medium type and temperature being coupled in the practical Service Environment of metal.
Evaluate complicated metal pair to the method for galvanic corrosion using above-mentioned measuring device, comprising the following steps:
(1) wire of unlike material is packaged into rectangular array electrode unit respectively, selection to be studied not
It with the rectangular array electrode unit of metal, is assigned into square insulating baffle, is assembled into large scale array electrode, it can be with
Meaning adjusts the array electrode unit exhaust position of different metal to get sample to be tested is arrived；
(2) good corrosive medium to be measured is configured as needed, and is placed on the temperature needed for guaranteeing to test in constant temperature water bath；
Sample to be tested is immersed in corrosive medium, reference electrode is placed in saturated potassium chloride solution, by salt bridge by corrosive medium and
Saturated potassium chloride solution connection；
(3) factually the research of border anode and cathode area needs, and selects required gold in the array electrode unit of every kind of metal
Belong to number of electrodes and position, the copper conductor end of the metal electrode in selected same array electrode unit connected together,
It is connected on Multi-channel galvanic corrosion tester on the working electrode of respective channel；The reference electrode end in each channel is connected to
It is connected again with saturated calomel electrode after together；After checking that each route has all been connected to, the measurement of Galvanic Current and current potential is carried out.
Apparatus of the present invention and method mentality of designing are as follows:
Using apparatus of the present invention and method, can to three kinds and its more than the galvanic corrosion of complicated metal pair pair survey
Amount is coupled metal arrangements mode by adjusting the position change of different metal array electrode in sample to be tested, by choosing every kind
The quantity of wire and position can measure the coupling rate of different anode and cathode area ratios in metallic array electrode, utilize multi-pass
Road can monitor the influence of different coupling sample geometric parameters and corrosive environment to galvanic corrosion simultaneously, realize that Fast Evaluation is complicated
The galvanic corrosion of metal pair pair.
It advantages of the present invention and has the beneficial effect that:
1, the present invention can to three kinds and the galvanic corrosion electric current of above every kind of metal of metal pair centering and coupling potential into
Row measurement, and traditional galvanic corrosion test method can only detect the galvanic corrosion electric current and idol of every kind of metal when two kinds of metals are coupled
Close current potential.
2, the present invention can be coupled metal arrangements by adjusting the position change of different metal array electrode in sample to be tested
Coupling metal sites are adjusted flexibly in mode, detect to the galvanic corrosion under different metal arrangement mode.
3, the present invention can measure different yin-yang by choosing the quantity of wire and position in every kind of metallic array electrode
The coupling rate of pole area ratio, the galvanic couple that can measure the coupling metal of different geometric parameter using identical sample to be tested are rotten
Erosion.
4, the present invention can carry out complicated metal pair to the coupling rate under various geometric parameters and corrosive environment
Fast Evaluation provides theoretical foundation for the galvanic corrosion prediction in practical application in industry.
Detailed description of the invention
Fig. 1 be same material wire using resin-encapsulated at small size rectangular array electrode schematic diagram.
Fig. 2 is the large scale array electrode for obtaining the small size rectangular array electrode assembling of different metal together,
That is the schematic surface of sample to be tested.
Fig. 3 is test device and sample to be tested and Multi-channel galvanic corrosion of the Fast Evaluation complexity metal pair to galvanic corrosion
Tester connection method schematic diagram.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and embodiments.
The present invention provide it is a kind of evaluate complicated metal pair to the test device and method of galvanic corrosion, which includes
Multi-channel galvanic corrosion tester, test sample and corrosive medium；
The Multi-channel galvanic corrosion tester is used for while monitoring each metal when the coupling of two or more metal
Galvanic Current and coupling potential；The Galvanic Current that coupling material is measured by zero resistance galvanometer, passes through current potential follower
To measure galvanic couple current potential.The port number of the Multi-channel galvanic corrosion tester is at least 4 channels, or 16 channels, 32
Channel or 64 channels, number of channels is more, and the sample size once tested is more.
The test sample is large scale array electrode, is the array electrode unit group by two or more small sizes
It fills, a kind of metal electrode is packaged into a small size rectangular array electrode unit, more in each array electrode unit
A metal electrode is regularly arranged；Metal electrode material in different array electrode units is different.
The array electrode unit is rectangle, sample of the array electrode unit of every kind of metal on length and width direction
Product quantity (metal electrode quantity) can be adjusted as needed, such as can be 10 × 2,9 × 3 etc..
The assembling process of the array electrode unit are as follows: multiple wires for being connected with copper conductor are sequentially inserted into insulation template
In, to get the length for arriving this kind of metal after the wire of copper conductor will be connected with together with insulation template package curing using resin
Rectangular array electrode unit.
The cross section of the wire is circle or rectangular, and the diameter or side length of cross section are 1-5 millimeters, metal filament length
2-5 centimetres, 0.3-2 millimeters of silk material spacing of degree；The material of the wire is the various metals being related in practical Service Environment,
Such as iron, aluminium, copper, titanium, magnesium.
The test sample assigns into group in square insulating baffle by the array electrode unit of two or more metal
It fills, can arbitrarily adjust the position of each array electrode unit.
The sample to be tested is placed in corrosive medium, and the corrosive medium is contained in heatable container, the container
It is put into constant temperature water bath and keeps test required temperature.The corrosive medium can be according in the coupling practical Service Environment of metal
Corrosive medium type and temperature are selected.
Embodiment 1
The present embodiment is to evaluate complicated metal pair to the test device of galvanic corrosion, including Multi-channel galvanic corrosion test
Instrument, sample to be tested and corrosive medium.
To be connected with Φ 1mm × 2cm of copper conductor 2024 aluminium alloy silk materials insertion insulation template in, using resin-encapsulated at
10 × 2 small size rectangular array electrode unit, the spacing between different silk materials is 0.5mm, as shown in Fig. 1, according to same
The method of sample respectively by 304 stainless steels, three kinds of Metal Packagings of H62 brass and Q235 carbon steel at 10 × 2 small size rectangle battle array
Column electrode unit.The array electrode unit of four kinds of metals according to 2024,304, the sequence of H62 and Q235 is in square insulating baffle
Arrangement, is assembled into large scale array electrode, i.e. sample to be tested, test surfaces pattern is as shown in Fig. 2.
The NaCl solution for having configured 3.5wt.% is test corrosive medium, and 3.5% NaCl solution is contained in 2L's
In beaker, and it is placed on the constant temperature of 30 DEG C of holding in water bath.Sample to be tested is immersed in corrosive medium, test surfaces level court
On.Choose the N in 2024 array electrode units1M12、N2M12、N3M12、N4M12Its Cu conductor wire end is connected in one by four metal electrodes
The working electrode position for being connected to channel 1 again is played, by the N in 304 array electrode units1M22、N2M22The Cu of two metal electrodes is led
Line end connects together, and is connected to the working electrode position in channel 2, by the N in H62 array electrode unit1M31、N2M31、N3M31、
N4M31、N5M31、N6M31The Cu conductor wire end of six roots of sensation metal electrode connects together, and is connected to the working electrode position in channel 3, obtains
2024,304, the area ratio of tri- kinds of metal electrodes to be measured of H62 is 4:2:6.The reference electrode end in three channels is linked together,
It is connected again with saturated calomel electrode (RE in Fig. 3), saturated calomel electrode is placed in saturated potassium chloride solution, it will by salt bridge
Corrosive medium is connected to saturated potassium chloride solution.Specific test device and sample to be tested and Multi-channel galvanic corrosion tester connect
It is as shown in Fig. 3 to connect method.
Identical sample to be tested is prepared, the N in 2024 array electrodes is chosen1M12、N2M12Two metals, its conductor wire end is connected
It is connected to the working electrode position in channel 4 together, by the N in H62 array electrode1M31、N2M31、N3M31Three plain conductor ends connect
Together, it is connected to the working electrode position in channel 5, by the N in Q235 array electrode1M41、N2M41、N3M41、N4M41Four metals
Conductor wire end connects together, and is connected to the working electrode position in channel 6, obtains the area ratio of tri- kinds of metals to be measured of 2024, H62, Q235
For 2:3:4.Other steps are same as above.
After being all connected to using each route of general-purpose table look-up, Multi-channel galvanic corrosion tester switch is opened, is carried out
The measurement of Galvanic Current and current potential, obtain 2024,304, H62, Q235 difference coupling metal is under different anode and cathode area ratios
Galvanic Current and coupling potential value.
Embodiment 2
It will be connected in the 304 stainless steel silk materials insertion insulation template of Φ 1.5mm × 3cm of copper conductor, use resin-encapsulated
At 9 × 3 array electrode, the spacing between different silk materials is 1mm, obtains rectangular array electrode, divides after the same method
Not by two kinds of Metal Packagings of Q235 carbon steel and H62 brass at 9 × 3 array electrode.Three kinds of metals are according to 304, Q235's and H62
Sequence arranges, and is assembled into large scale array electrode.
The Na of 0.1mol/L is configured2SO4Solution is test corrosive medium, by Na2SO4Solution is contained in the beaker of 2L
In, and it is placed on the constant temperature of 25 DEG C of holding in water bath.Sample to be tested is immersed in corrosive medium, test surfaces level is upward.Choosing
Take the N in 304 array electrodes1M11、N1M12、N2M11、N2M12Its copper conductor end is connected together and is connected to channel 1 by four metals
Working electrode position, by the N in Q235 array electrode3M21And N4M21Two plain conductor ends connect together, and are connected to the work in channel 2
Make electrode position, by the N in H62 array electrode5M31、N6M31、N7M31、N8M31、N9M31、N5M32、N6M32、N7M32、N8M32、N9M32
Ten plain conductor ends connect together, and are connected to the working electrode position in channel 3, obtain tri- kinds of metals to be measured of 304, Q235, H62
Area ratio is 4:2:10.The reference electrode end in three channels is linked together, then is connected with saturated calomel electrode, by reference electricity
Pole is placed in saturated potassium chloride solution, is connected to corrosive medium with saturated potassium chloride solution by salt bridge.
Identical sample to be tested is prepared, the N in 304 array electrodes is chosen4M12、N5M12、N6M12Three metals, by its conducting wire
End, which connects together, is connected to the working electrode position in channel 4, by the N in Q235 array electrode3M21、N3M22、N4M21、N4M22And N5M21
Five plain conductor ends connect together, and are connected to the working electrode position in channel 5, by the N in H62 array electrode5M31、N6M31、
N7M31、N8M31、N9M31、N5M32、N6M32、N7M32、N8M32Nine plain conductor ends connect together, and are connected to the working electrode in channel 6
Position, the area ratio for obtaining tri- kinds of metals to be measured of 304, Q235, H62 is 3:5:9.Other steps are same as above.
Identical sample to be tested is prepared, the N in 304 array electrodes is chosen7M11、N8M12Two metals, its conductor wire end is connected
It is connected to the working electrode position in channel 7 together, by the N in Q235 array electrode1M22、N2M21、N3M22And N4M21Four metals
Conductor wire end connects together, and is connected to the working electrode position in channel 8, by the N in H62 array electrode7M31、N8M31、N9M31Three gold
Belong to conductor wire end to connect together, is connected to the working electrode position in channel 9, obtains the area ratio of tri- kinds of metals to be measured of 304, Q235, H62
For 2:4:3.Other steps are same as above.
After being all connected to using each route of general-purpose table look-up, Multi-channel galvanic corrosion tester switch is opened, is carried out
The measurement of Galvanic Current and current potential obtains the Galvanic Current and coupling of tri- kinds of metal difference anode and cathode area ratios of 304, Q235, H62
Potential value.
Claims (9)
1. a kind of evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the device includes multichannel galvanic couple
Corrosion tester, test sample and corrosive medium；Wherein:
The Multi-channel galvanic corrosion tester is used for while monitoring the electricity of each metal when the coupling of two or more metal
Even electric current and coupling potential；
The test sample is that composed large scale array electrode, the sample to be tested are integrated by multiple metal electrodes
It is placed in corrosive medium；
The corrosive medium is contained in heatable container, which, which is put into constant temperature water bath, keeps test required temperature.
2. according to claim 1 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: described more
The port number of channel galvanic corrosion tester is at least 4 channels, and number of channels is more, and the sample size once tested is more.
3. according to claim 1 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: described big
Size array electrode is made of two or more array electrode units, and each array electrode unit is by multiple regularly arranged
Same metal electrode package form；Metal electrode material in different array electrode units is different.
4. according to claim 3 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the battle array
Column electrode unit is rectangle, and metal electrode quantity of the array electrode unit of every kind of metal on length and width direction can root
According to needing to adjust.
5. according to claim 3 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the battle array
Column electrode unit includes multiple wires for being connected with copper conductor and insulation template, and the wire for being connected with copper conductor is inserted into insulation respectively
In template, to get to this kind of metal after the wire of copper conductor will be connected with together with insulation template package curing using resin
Rectangular array electrode unit.
6. according to claim 5 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the gold
Belong to the cross section of silk be it is round or rectangular, the diameter or side length of cross section are 1-5 millimeters, 2-5 centimetres of wire length, silk material
0.3-2 millimeters of spacing；The material of the wire is the various metals being related in practical Service Environment.
7. according to claim 3 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the survey
Test agent is assigned into square insulating baffle by the array electrode unit of two or more metal to be assembled, can be random
Adjust the position of each array electrode unit.
8. according to claim 1 evaluate complicated metal pair to the test device of galvanic corrosion, it is characterised in that: the corruption
Erosion medium can be selected according to the corrosive medium type and temperature being coupled in the practical Service Environment of metal.
9. a kind of evaluate complicated metal pair to the method for galvanic corrosion using any measuring device of claim 1-8,
It is characterized by: method includes the following steps:
(1) wire of unlike material is packaged into rectangular array electrode unit respectively, chooses the difference gold to be studied
The rectangular array electrode unit of category, is assigned into square insulating baffle, and large scale array electrode is assembled into, and can arbitrarily be adjusted
The array electrode unit exhaust position of whole different metal to get arrive sample to be tested；
(2) good corrosive medium to be measured is configured as needed, and is placed on the temperature needed for guaranteeing to test in constant temperature water bath；It will be to
Sample is immersed in corrosive medium, and reference electrode is placed in saturated potassium chloride solution, by salt bridge by corrosive medium and saturation
Klorvess Liquid connection；
(3) factually the research of border anode and cathode area needs, and required metal electricity is selected in the array electrode unit of every kind of metal
The copper conductor end of metal electrode in selected same array electrode unit is connected together, then connected by number of poles and position
It is connected on Multi-channel galvanic corrosion tester on the working electrode of respective channel；The reference electrode end in each channel links together
It is connected again with saturated calomel electrode afterwards；After checking that each route has all been connected to, the measurement of Galvanic Current and current potential is carried out.
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| CN113029931A (en) * | 2021-05-06 | 2021-06-25 | 中国船舶重工集团公司第七二五研究所 | Multi-working-condition galvanic corrosion test device |
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