CN106148969A - A kind of sacrificial magnesium alloy anode current efficiency device for fast detecting and method - Google Patents
A kind of sacrificial magnesium alloy anode current efficiency device for fast detecting and method Download PDFInfo
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Abstract
The present invention relates to a kind of sacrificial magnesium alloy anode current efficiency device for fast detecting and method, belong to metallic material corrosion technical field of measurement and test.This device includes regulated power supply, No. 1 coulant meter, test cell, No. 2 coulant meters, adjustable resistance and ammeter, being composed in series test loop, test cell includes the pre-weighed sacrificial magnesium alloy anode coupon as anode, as the steel crucibles container of negative electrode and electrolyte.Within the test period, the test cell of coupled in series is led to DC current, measures the total ampere-hour flowing through battery, coupon is cleaned, weighs, and calculate ampere-hour and the corresponding current efficiency that coupon loss per unit mass obtains.The inventive method accuracy is higher, and close or consistent with ASTM G972000 test method results, can quickly judge whether this material may be used for being processed further or can dispatching from the factory as qualified products, the reduction of erection time, improve production efficiency, significant to actual production.
Description
Technical field
The present invention relates to a kind of sacrificial magnesium alloy anode current efficiency device for fast detecting and method, belong to metal material
Corrosion test technical field.
Background technology
Steel in water heater need cathodic protection, and the mainly extruding magnesium anode used at present and extruded aluminium anode come
Carry out cathodic protection.The current efficiency of magnesium anode ingot casting and aluminium anodes ingot casting directly decides extruding magnesium anode and extruding
The current efficiency of aluminium anodes.Therefore, for guaranteeing to extrude the qualified of magnesium anode and extruded aluminium anodic current efficiency, need
First the current efficiency of magnesium anode ingot casting or aluminium anodes ingot casting is tested.
The basic skills of current efficiency test is that, in given solution medium, carbon steel tank or stainless cylinder of steel do negative electrode,
Anode stub to be tested does anode, and is formed loop by additional power source.Logical stable electric current density in loop, with copper
Coulant meter metering effective electricity, calculates the current efficiency of anode by the weightlessness of anode stub.
The standard method of test anodic current efficiency has: ASTM G972000, SY/T 0095-2000, GB/T
17731-2004, GB/T17848-1999 etc..
Wherein ASTM G972000, SY/T 0095-2000, GB/T 17731-2004 test method are all to simulate soil
Earth liquid (saturated calcium sulfate and magnesium hydroxide solution) is medium, and holding anodic current density is 0.039mA/cm2,
Measuring the current efficiency of sacrificial anode, test period is 14 days.This method test period is long, it is difficult in time
The current efficiency of reflection anode ingot casting, serious suppression extruding magnesium anode and the raising of extruded aluminium anode production efficiency.
In GB/T17848-1999 test method, the test to magnesium anode current efficiency is with Mg (OH)2Saturated people
Work sea water is that medium is carried out, and has two kinds of methods, and it is 1mA/cm that one is to maintain electric current density2Carry out 10 days
Test, this method is also the slowest；Second method is to shorten the cycle by adjustment anodic current density size,
Time used is 4 days, and the electric current density of first day to the 4th day is 1.5mA/cm successively2、0.40mA/cm2、
4.0mA/cm2、1.5mA/cm2, this method relative to additive method than ASTM G972000, SY/T 0095-2000,
The GB/T 17731-2004 cycle is short, beneficially the raising of production efficiency, but test result and ASTM G972000,
SY/T 0095-2000, GB/T 17731-2004 result the most inconsistent.Particularly sacrificial magnesium alloy anode, tool
Having higher chemism, surface is difficult to form effective protecting film, and in aqueous medium, magnesium is the strongest from corrosion,
At Mg (OH)2Row is corroded in saturated artificial seawater and in simulation liquid soil (saturated calcium sulfate and magnesium hydroxide solution)
For widely different, the result that therefore current efficiency of sacrificial magnesium alloy anode is recorded by GB/T17848-1999 with
ASTM G972000, SY/T 0095-2000, the test result difference of GB/T 17731-2004 highlights especially, and
And do not have rule to follow.Due to magnesium alloy self, Seawater is the harshest for magnesium alloy,
GB/T17848-1999 is the most inapplicable for the magnesium alloy in high resistance medium.
By to magnesium alloy anode in simulation liquid soil (saturated calcium sulfate and magnesium hydroxide solution) (according to ASTM
G972000, SY/T 0095-2000, GB/T 17731-2004 method performs) research of 14 days corrosion behaviors, send out
Existing: from first day to the 14th day in simulation liquid soil, the change of magnesium alloy anode current efficiency numerical value is from low
It is gradually increased to height；6th day, current efficiency numerical value reached stable, the when of i.e. the 6th day to the 14th day, and electricity
Stream efficiency comparison is constant；First day current efficiency height of magnesium anode, then the current efficiency of the 14th day is the highest；Magnesium
First day current efficiency of anode is low, and 14 days current efficiency of magnesium anode is low.
Why sacrificial magnesium alloy anode has such corrosion behavior in 14 days what current efficiency was tested, actually
Magnesium alloy own characteristic is determined.Compared with aluminium alloy, magnesium and magnesium alloy self have higher chemism, table
Face is difficult to form effective protecting film, and it is the strongest from corrosion.The organizational structure of magnesium alloy anode directly determines
Sacrificial magnesium alloy anode its electrochemical corrosion and chemical attack of magnesium alloy self in aqueous medium, electrochemical corrosion and
(self crystal grain runaway corrosion refers to because there occurs chemical attack or the electrochemistry of self in self crystal grain runaway corrosion
Corroding and cause crystal boundary to loosen, crystal grain comes off.Coming off of self crystal grain does not provide effective to protected negative electrode
Protection electronics, thus be also the principal element reducing sacrificial magnesium alloy anode current efficiency) proportion.Owing to protecting
The ratio accounted in the electrochemical corrosion protecting negative electrode and occur general corrosion in the magnesium alloy is big, then to protected the moon
The effectively protection electronics that pole provides is relatively just many, and the current efficiency of magnesium alloy anode will be high；The change of magnesium alloy self
Learn burn into electrochemical corrosion and self crystal grain runaway corrosion summation accounts for ratio in sacrificial magnesium alloy anode general corrosion
Height, then the current efficiency of magnesium alloy anode will be low.
Sacrificial magnesium alloy anode (refers to ASTM G972000, SY/T 0095-2000, GB/T in conventional method
17731-2004 method) in 14 days electric current efficiency tests during, the starting stage essentially consists in magnesium anode material
Surface, and the oxide-film of magnesium alloy its own face is difficult to play a protective role matrix, so Initial Corrosion behavior is just
Reflect materials microstructure feature.But along with the prolongation of soak time, the corrosion that the attachment in surface of test piece is piled up is produced
Material itself is played a protective role by thing film, so the time is the longest, the current efficiency obtained is the highest.So it is short
The current efficiency test of phase just can reflect the quality of material.Organizational structure is corrosion-resistant, and initial current efficiency is the most just
The highest, and corrosion products film layer can be relatively compact, the best to matrix protective effect, the effect of final 14 days
Rate is the highest, and the highest with the difference of first day electric current efficiency numbers.Organizational structure corrosion resistance is poor, the initial stage
Current efficiency numerical value the poorest because corrosion rate is fast, corrosion products film is the most of a relatively loose, to the lining bar later stage
Protective effect is the most weak, increase in time, although the numerical value of current efficiency is to increase, but the amplitude increased is very
Little.The organizational structure that even corrosion resisting property is poor can show corrosive film layer and have no the phenomenon of protective effect to lining bar, i.e.
The current efficiency of test in first day is consistent with the current efficiency numerical value of test in the 14th day.
It is true that as producer, for the concrete numerical value of the current efficiency that compares, more concerned with the current efficiency of product
(generally for extrusion magnesium alloy sacrificial anode rod, client thinks according to ASTM G972000 whether to belong to acceptability limit
Performing, current efficiency is taken as qualified products higher than 50%).Product can be passed judgment on the most qualified by the method,
Accuracy is higher, and (two kind method testing knots close or consistent with ASTM G972000 test method results
Fruit difference 1%), can quickly judge whether this material may be used for being processed further (such as extruding) or can making
Dispatch from the factory for qualified products, so the reduction of erection time, improve production efficiency, significant to actual production.
Summary of the invention
It is an object of the invention to provide a kind of sacrificial magnesium alloy anode current efficiency short period measuring device and method, with
The most quickly obtain the conclusion that sacrificial anode is the most qualified.
The research explanation of the corrosion behavior above-mentioned to magnesium alloy, short-term quickly tests sacrificial magnesium alloy anode current efficiency
Being possible to property.The present invention is by suitable harshness (but harshness more than sea water increasing corrosive medium
Low), suitable raising electric current density (but than 1mA/cm in GB/T17848-1999 test method2Low) just may be used
Realize the current efficiency of sacrificial magnesium alloy anode in high resistance medium of detection fast and effectively.
The sacrificial magnesium alloy anode current efficiency device for fast detecting of the present invention, including regulated power supply, No. 1 coulant meter,
Test cell, No. 2 coulant meters, adjustable resistance and ammeter etc., be sequentially connected in series test loop, described examination
Electrical verification pond includes the pre-weighed sacrificial magnesium alloy anode coupon as anode, as the steel crucibles container of negative electrode and electricity
Solve liquid etc..
Described pre-weighed a diameter of 12mm～20mm of sacrificial magnesium alloy anode coupon.
Described electrolyte is by 5.0g calcium sulfate (CaSO4·2H2O), 0.1g magnesium hydroxide (Mg (OH)2), 0～3.0g
Sodium chloride and 1000mL deionized water are formulated.
The sacrificial magnesium alloy anode current efficiency method for quick of the present invention, comprises the steps: to use by voltage stabilizing
Power supply, No. 1 coulant meter, test cell, No. 2 coulant meters, adjustable resistance and ammeter etc., be sequentially connected in series
Test loop, described test cell includes the pre-weighed sacrificial magnesium alloy anode coupon as anode, as negative electrode
Steel crucibles container and electrolyte etc.；Within the test period, the test cell of coupled in series is led to DC current,
Measure the total ampere-hour (Ah) flowing through battery, after off-test, each sacrificial magnesium alloy anode coupon is cleaned,
Weigh, and calculate ampere-hour and the corresponding current efficiency that coupon loss per unit mass obtains.
In the above-mentioned methods, described pre-weighed a diameter of 12mm～20mm of sacrificial magnesium alloy anode coupon.Described
Electrolyte by 5.0g calcium sulfate (CaSO4·2H2O), 0.1g magnesium hydroxide (Mg (OH)2), 0～3.0g sodium chloride
Formulated with 1000mL deionized water.
The test cell of coupled in series is led to DC current, and anodic current density is 0.039～0.200mA/cm2。
The test period of this method is 1 day or 6 days.
Described sacrificial magnesium alloy anode coupon through 1 day period measuring, the current efficiency coupon less than 45.5%,
It is judged to defective；The current efficiency coupon more than 48.5%, it is determined that for qualified；Current efficiency is 45.5%～48.5%,
Carry out the test of 6 days again.Sacrificial magnesium alloy anode coupon through 6 days period measurings, current efficiency more than 50% is
Qualified, it is defective less than 50%.
Before test, sacrificial magnesium alloy anode coupon first passes through water before weighing and acetone cleans, then 105 DEG C of bakings
Case carries out 30min be dried and cool down；After off-test, sacrificial magnesium alloy anode coupon is cleaned corruption with cleanout fluid
Clean with water after erosion product, 105 DEG C of baking ovens carry out 30min and is dried and cools down, then weighing measurement, calculate
Mass loss and current efficiency.
Advantages of the present invention is:
The present invention utilizes the corrosion behavior feature of sacrificial magnesium alloy anode, it is proposed that a kind of sacrificial magnesium alloy anode short week
Phase detection method, it is achieved just obtain current efficiency for sacrificial anode in one day or six days.The method accuracy is higher,
And close or consistent with ASTM G972000 test method results (two kinds of method testing results difference 4.2% with
In), can quickly judge whether this material may be used for being processed further (such as extruding) or can be as qualified
Product export, and then reduction of erection time, improve production efficiency, significant to actual production.
Accompanying drawing explanation
Fig. 1 is test loop schematic diagram.
Main Reference Numerals:
1 regulated power supply 21 coulant meter
3 steel crucibles containers (negative electrode) 4 magnesium alloy coupon (anode)
5 insulation 6 No. 2 coulant meters of plug
7 adjustable resistance 8 ammeters
Detailed description of the invention
As it is shown in figure 1, sacrificial magnesium alloy anode current efficiency method for quick of the present invention, by regulated power supply 1,1
Number coulant meter 2, test cell, No. 2 coulant meters 6, adjustable resistance 7 and ammeter 8 (A in figure) are sequentially connected in series
Composition test loop, test cell is by the pre-weighed magnesium alloy coupon 4 as anode, as the steel crucibles of negative electrode
Container 2, insulation plug 5 and electrolyte composition.Within the test period, the test cell of coupled in series is led to direct current
Electric current, measures the total ampere-hour (Ah) flowing through battery, after off-test, tries each sacrificial magnesium alloy anode
Sample cleans, weighs, and calculates ampere-hour and corresponding current efficiency that sample lost per unit mass obtains.
According to 5.0g calcium sulfate (CaSO4·2H2O), 0.1g magnesium hydroxide (Mg (OH)2), 0～3.0g chlorination
Sodium, the most appropriate electrolyte of proportions of 1000mL deionized water, and the steel crucibles being loaded as negative electrode holds
In device 2.
From the sacrificial magnesium alloy anode rod of sacrificial magnesium alloy anode ingot or extruding, diameter is taken off in machining
12.5mm～20mm magnesium alloy coupon 4.First it is dried with water and acetone cleaning, 105 DEG C of baking oven 30min and cools down,
It is re-weighed.
Connecting wire to sacrificial anode magnesium alloy coupon 4, stay suitable test surfaces, remaining position includes wire
Junction all seals with plastics waterproofing insulating tape, immerses sample equipped with in the steel crucibles container 3 of electrolyte,
The test surfaces of sample to be dipped in electrolyte completely, and mutually insulated between sample and steel crucibles container 3.
Sacrificial magnesium alloy anode connects the positive pole of constant voltage dc source, and carbon steel steel crucibles container 3 connects negative pole, goes here and there simultaneously
Join coulant meter.Test area according to lining bar adjusts electric current, to ensure electric current density.Anodic current density is
0.039～0.200mA/cm2.Through 1 day or 6 days, disconnecting circuit, takes out sacrificial magnesium alloy anode lining bar, warp
Over cleaning liquid cleans with water after removing corrosion product, and 105 DEG C of baking oven 30min are dried, cooled down, and are re-weighed measurement,
Calculate mass loss, and according to the electricity (i.e. total ampere-hour (Ah)) flowing through battery of coulant meter test, calculate
The current efficiency of anode stub.
In this method, sacrificial magnesium alloy anode coupon was through 1 day period measuring: 1) current efficiency is less than 45.5%
Lining bar, test terminates, it is determined that for defective, is unsuitable for being processed or dispatching from the factory；2) current efficiency is more than 48.5
The lining bar of %, test terminates, it is determined that for qualified, and the current efficiency of corresponding 14 days is more than 50%；3) current efficiency
It is 45.5%～48.5%, supplements the test of 6 days；Result is qualified more than 50%, is defective less than 50%.
Embodiment 1
Electrolyte is according to calcium sulfate (CaSO4·2H2O) 5.0g, magnesium hydroxide (Mg (OH)2) 0.1g, go from
The proportions of sub-water 1000mL loads steel crucibles container.
Take magnesium anode rod 1#, 2#, 3#, 4#, 5#, 6#, 7#, 8# and be processed as the coupon of diameter 12.5mm, clearly
Wash, be dried, cool down after weigh.UNICOM's wire, stays 100mm testing length, seals remaining position, calculates and surveys
Examination area, passes through 0.039mA/cm2Electric current density.
Be listed in table 1 through 1 day test result, wherein 1#, 2# coupon current efficiency of 1 day be respectively 42.2%,
45.4%, less than 45.5%, test terminates, and this coupon is judged to defective；3#, 4#, 5# coupon, current efficiency
Being respectively 48.6%, 49.2%, 51.3%, test terminates, and this coupon is judged to qualified lining bar；6#, 7#, 8# try
Rod current efficiency is respectively 46.1%, 47.3%, 48.4%, is between 45.5%～48.5%, needs to carry out 6 days
Test, result shows that 6# coupon current efficiency was 52.8%, it is determined that for qualified through test in 6 days, 7# coupon electricity
Stream efficiency is 48.6%, it is determined that for defective；8# coupon is 55.2%, it is determined that qualified.
Comparative example 1
Take magnesium anode rod 1#, 2#, 3#, 4#, 5#, 6#, 7#, 8# same as in Example 1 and be processed as diameter
The coupon of 12.5mm, carries out 14 days electric current efficiency tests according to ASTM G972000, and the results are shown in Table 1.
Table 1 sacrificial magnesium alloy anode was through the test result (embodiment 1 and comparative example 1) of 1 day 6 days 14 days
Embodiment 2
Electrolyte is according to calcium sulfate (CaSO4·2H2O) 5.0g, magnesium hydroxide (Mg (OH)2) 0.1g, chlorination
Sodium 3.0g, the proportions of deionized water 1000mL load steel crucibles container.
Take magnesium anode lining bar 11#, 12#, 13#, 14#, 15#, 16#, 17#, 18# and be processed as diameter 20mm's
Coupon, clean, be dried, cool down after weigh.UNICOM's wire, stays 100mm testing length, seals remaining position,
Calculate test area, pass through 0.2mA/cm2Electric current density.
Be listed in table 1 through 1 day test result, wherein 11#, 12# coupon current efficiency of 1 day be respectively 39.8%,
45.2%, less than 45.5%, test terminates, and this coupon is judged to defective；13#, 14#, 15# coupon, electric current
Efficiency is respectively 49.8%, 49.0%, 52.3%, and test terminates, and this coupon is judged to qualified lining bar；16#、17#、
18# coupon current efficiency is respectively 47.8%, 47.1%, 48.3%, is in 45.5%～48.5%, needs to carry out 6
It test, result shows that 16# coupon current efficiency was 48.8%, it is determined that for defective, 17# through test in 6 days
Coupon current efficiency is 50.2%, it is determined that for qualified；18# coupon is 53.2%, it is determined that qualified.
Comparative example 2
Sampling rod 11#, 12#, 13#, 14#, 15#, 16#, 17#, 18# are processed as the lining bar of diameter 20mm,
Remaining is with reference to carrying out 14 days electric current efficiency tests according to ASTM G972000, and the results are shown in Table 2.
Table 2 sacrificial magnesium alloy anode was through the test result (embodiment 2 and comparative example 2) of 1 day 6 days 14 days
By contrasting above, it can be seen that the inventive method accuracy is higher, and with ASTM G972000 test side
Method result is close or consistent, and (final testing result of two kinds of methods differs within 4.2%, and within first day, test difference exists
Within 8.4%), can quickly judge whether this material may be used for being processed further (such as extruding) or can making
Dispatch from the factory for qualified products, so the reduction of erection time, improve production efficiency, significant to actual production.
Claims (10)
1. a sacrificial magnesium alloy anode current efficiency device for fast detecting, it is characterised in that: this device includes surely
Voltage source, No. 1 coulant meter, test cell, No. 2 coulant meters, adjustable resistance and ammeter, be sequentially connected in series
Test loop, described test cell includes the pre-weighed sacrificial magnesium alloy anode coupon as anode, as negative electrode
Steel crucibles container and electrolyte.
Sacrificial magnesium alloy anode current efficiency device for fast detecting the most according to claim 1, its feature exists
In: described pre-weighed a diameter of 12mm～20mm of sacrificial magnesium alloy anode coupon.
Sacrificial magnesium alloy anode current efficiency device for fast detecting the most according to claim 1, its feature exists
In: described electrolyte is by 5.0g calcium sulfate, 0.1g magnesium hydroxide, 0～3.0g sodium chloride and 1000mL deionization
Water is formulated.
4. a sacrificial magnesium alloy anode current efficiency method for quick, comprises the steps: to use by voltage stabilizing
The test that power supply, No. 1 coulant meter, test cell, No. 2 coulant meters, adjustable resistance and ammeter are composed in series is returned
Road, described test cell includes the pre-weighed sacrificial magnesium alloy anode coupon as anode, steel as negative electrode
Vessels crucible and electrolyte；Within the test period, the test cell of coupled in series being led to DC current, measurement flows through
Total ampere-hour of battery, after off-test, cleans sacrificial magnesium alloy anode coupon, weighs, and calculate coupon
The ampere-hour that loss per unit mass obtains and corresponding current efficiency.
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 4, its feature exists
In: described pre-weighed a diameter of 12mm～20mm of sacrificial magnesium alloy anode coupon；Described electrolyte is by 5.0g
Calcium sulfate, 0.1g magnesium hydroxide, 0～3.0g sodium chloride and 1000mL deionized water are formulated.
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 4, its feature exists
In: the test cell of coupled in series is led to DC current, and anodic current density is 0.039～0.200mA/cm2。
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 4, its feature exists
In: the described test period is 1 day or 6 days.
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 7, its feature exists
In: described sacrificial magnesium alloy anode coupon through 1 day period measuring, the current efficiency coupon less than 45.5%,
It is judged to defective；The current efficiency coupon more than 48.5%, it is determined that for qualified；Current efficiency is 45.5%～48.5%,
Carry out the test of 6 days again.
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 8, its feature exists
In: described sacrificial magnesium alloy anode coupon was through 6 days period measurings, and current efficiency is qualified more than 50%, little
It is defective in 50%.
Sacrificial magnesium alloy anode current efficiency method for quick the most according to claim 4, its feature exists
In: before test, sacrificial magnesium alloy anode coupon first passes through water before weighing and acetone cleans, then 105 DEG C of bakings
Case carries out 30min be dried and cool down；After off-test, sacrificial magnesium alloy anode coupon is cleaned corruption with cleanout fluid
Clean with water after erosion product, 105 DEG C of baking ovens carry out 30min and is dried and cools down, then weighing measurement, calculate
Mass loss and current efficiency.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114075671A (en) * | 2021-11-16 | 2022-02-22 | 青岛双瑞海洋环境工程股份有限公司 | High-resistivity environment sacrificial anode protection effect test method and device |
| CN115613039A (en) * | 2022-10-24 | 2023-01-17 | 中国船舶重工集团公司第七二五研究所 | Sacrificial anode electrochemical performance testing device under flowing water working condition |
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| WO2007149724A2 (en) * | 2006-06-12 | 2007-12-27 | Pacific Biosciences Of California, Inc. | Substrates for performing analytical reactions |
| CN101373180A (en) * | 2008-09-26 | 2009-02-25 | 仝仲盛 | Method for detecting magnesium alloy sacrificial anode electrochemical performance |
| CN201444146U (en) * | 2009-07-13 | 2010-04-28 | 淄博宏泰防腐有限公司 | Sacrificial anode electrochemical property detecting apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007149724A2 (en) * | 2006-06-12 | 2007-12-27 | Pacific Biosciences Of California, Inc. | Substrates for performing analytical reactions |
| CN101373180A (en) * | 2008-09-26 | 2009-02-25 | 仝仲盛 | Method for detecting magnesium alloy sacrificial anode electrochemical performance |
| CN201444146U (en) * | 2009-07-13 | 2010-04-28 | 淄博宏泰防腐有限公司 | Sacrificial anode electrochemical property detecting apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114075671A (en) * | 2021-11-16 | 2022-02-22 | 青岛双瑞海洋环境工程股份有限公司 | High-resistivity environment sacrificial anode protection effect test method and device |
| CN114075671B (en) * | 2021-11-16 | 2023-04-25 | 青岛双瑞海洋环境工程股份有限公司 | High-resistivity environment sacrificial anode protection effect test method and device |
| CN115613039A (en) * | 2022-10-24 | 2023-01-17 | 中国船舶重工集团公司第七二五研究所 | Sacrificial anode electrochemical performance testing device under flowing water working condition |
| CN115613039B (en) * | 2022-10-24 | 2024-04-26 | 中国船舶重工集团公司第七二五研究所 | Sacrificial anode electrochemical performance testing device under water-moving working condition |
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Application publication date: 20161123 |
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