CN108344681A - It is electrolysed the test method of ballast tank and its piping coating performance under ballast water environment - Google Patents
It is electrolysed the test method of ballast tank and its piping coating performance under ballast water environment Download PDFInfo
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- CN108344681A CN108344681A CN201810093137.4A CN201810093137A CN108344681A CN 108344681 A CN108344681 A CN 108344681A CN 201810093137 A CN201810093137 A CN 201810093137A CN 108344681 A CN108344681 A CN 108344681A
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Abstract
The test method of ballast tank and its piping coating performance prepares electrolytic seawater by electrolytic seawater device under electrolysis ballast water environment；It is electrolytic seawater is closed, be kept in dark place after the completion of preparation；Electrolytic seawater is mixed with natural sea-water according to different proportion, electrolytic seawater concentration is titrated by iodimetric titration, prepares the electrolytic seawater of different residual chlorine concentrations；In the electrolytic seawater of different residual chlorine concentrations, soak test and PSPC simulation ballast tank experiments are carried out respectively.The present invention can meet in experiment indoor test ship protective coating especially ballast tank of ship and its piping protective coating, and the performance change in electrolytic seawater so as to shorten the coating R＆D cycle, improves detection efficiency, has important practical significance.
Description
Technical field
The present invention relates to experimental method technical fields, and in particular to ballast tank and its piping under a kind of electrolysis ballast water environment
The test method of coating performance.
Background technology
The uncontrolled discharge of ballast water for ship and deposit, can lead to the transfer of unwanted aquatic organism, and cause external harmful
The invasion of marine organisms damages environment, health, ecosystem etc..International Maritime Organization passed through at 2 months 2004
《Management of Ships ' Ballast Water in 2004 and sediment monitoring and management contract》（Abbreviation compressive effect）, it is intended to pass through ship pressure
Control and the management of water and deposit are carried to prevent, reduce and finally eliminate the transfer of unwanted aquatic organism to environment, the ecosystem
The risk Deng caused by.End in July, 2014, there is 43 state approvals pact；It is notified to according to International Chamber of Shipping ICS, India
Nicaea agrees to execute in the 28th regular meeting of International Maritime Organization's conference by a statement《Ballast water is public
About》, it means that the pact, which has met its effective term — that is, accounted for the member state of world's merchant ship gross tonnage 35%, agrees with the pact
Come into force execution.
Currently, Ballast Management mainly installs ballast water treatment system by ship, ballast water is handled to expire
Foot.In many treatment technologies, electrolysis has many advantages, such as that technology maturation, expense be low, high treating effect, therefore is widely used.
Multiple countries such as China, the U.S., South Korea and Japan are all in the research for carrying out ballast water electrolysis treatment technology.Lloyd's Register of Shipping
《The ballast water treatment state of the art is reported》It also shows, ultraviolet method and electrolysis are the mainstream technology of current ballast water treatment, future
Ballast water equipment Market will mainly be occupied by ultraviolet method and electrolysis.
Electrolytic seawater will produce a variety of active materials having compared with Strong oxdiative ability, may such as hypochlorous acid and hypochlorite
Protective coating antiseptic property can be caused to decline, corrosion then is generated to associated pipe and ballast tank bulkhead metal, to jeopardize ship
Oceangoing ship operation safety.International Maritime Organization has required comprehensively, in depth to assess the influence that the treatment technology corrodes ballast tank.Mesh
Before, about corrosion mechanism of the Submerged ARC Welding in Shipbuilding Carbon Steel in natural sea-water environment and chlorination briny environment and behavior, there are many researchs, and
It is less that research is influenced on ballast tank coating about electrolysis ballast water.
Compressive effect is formally effective in September in 2017 8 days, but has no electrolysis ballast water to ship after pact comes into force
The system research that oceangoing ship ballast tank and its piping protective coating influence.2006, IMO maritime safety committee the 82nd
Secondary meeting has passed through the amendment of Convention on the Life Safety at Sea, wherein one of the attachment as pact, specialized ships ballast tank is protected
Protect coating performance standard（Abbreviation PSPC）Also become mandatory standard.PSPC requires ballast tank protective coating to reach use in 15 years
Service life, it is necessary to pass through laboratory speeding-up simulation experiment in 180 days, i.e. PSPC-WBT experiments.Since the PSPC norm-setting times are than pressing
Carry water pact earlier, the use environment of coating is natural sea-water when specification and indoor speeding-up simulation are tested, at ballast water
Whether a large amount of installations of reason system, the active material such as hypochlorous acid etc. that electrolytic seawater generates can influence coating, steel plate or the moon
Pole protecting effect, it is unknown then to influence the coating protection service life.But current shipbuilding industry, national standard even International Maritime group
Knitting does not have relevant test method, and the country carries out technique study that ballast water treatment system influences ballast tank coating performance more
It is blank.
Therefore, influence of the electrolysis ballast water treatment system to ballast tank of ship and its piping protective coating performance is carried out to grind
Study carefully, ballast water treatment system is promoted and applied, ensures that safety of ship is of great significance.
Invention content
The object of the present invention is to provide the test sides of ballast tank and its piping coating performance under a kind of electrolysis ballast water environment
Method.
Present invention technical solution used for the above purpose is：It is electrolysed ballast tank and its piping under ballast water environment
The test method of coating performance, includes the following steps：
（1）, by electrolytic seawater device, prepare electrolytic seawater；It is electrolytic seawater is closed, be kept in dark place after the completion of preparation；
（2）, electrolytic seawater mixed with natural sea-water according to different proportion, electrolytic seawater concentration is dripped by iodimetric titration
It is fixed, prepare the electrolytic seawater of different residual chlorine concentrations；
（3）, in the electrolytic seawater of different residual chlorine concentrations, respectively carry out soak test and PSPC simulation ballast tank experiment；
A, soak test：
It takes test piece, after cut, is soaked in respectively in the electrolytic seawater of different residual chlorine concentrations, in experiment the 1st, 2,3,4,5,6
At a month, whether the coating observed on test piece blisters, and the stripping of the water absorption rate of the coating on testing experiment model, cut,
Cathodic protection spelter mass change is carried out at the same time electrochemical impedance spectroscopy test；
B, PSPC simulates ballast tank experiment：
Modulus intends ballast tank model, according to IMO《Ballast tank of ship protective coating performance standard》, tried using seawater sagregated ballast tanker
Tryoff carries out top cut, side plate without cooling, side plate cooling and bottom plate cathodic disbonding experiment, after the test, testing coating
Resistance to cathodic disbonding performance.
Wherein, step（1）In, electrolytic seawater device includes containing the electrolytic cell of natural sea-water, potentiostat and by electricity
Machine drive and be placed in the rabbling mechanism in electrolytic cell, the cathode and anode of potentiostat are dipped in the natural sea-water of electrolytic cell.
Wherein, step（3）In a, it is 150mm × 70mm × 2mm, spray that the ground of test piece, which selects Q235 carbon steels, size,
Sand is to Sa2.5 grades of cleannes, 30-50 μm of roughness, 320 μm of application twice epoxy universal primer.
Wherein, step（3）In b, simulation ballast tank model ground select Q235 carbon steels, size be 400mm × 200mm ×
3mm, sandblasting to Sa2.5 grades of cleannes, 30-50 μm of roughness；One of inorganic primer for zinc silicate shop of first application, thickness 15-
20 μm, 2 months outdoor exposures are carried out, after low pressure washing, then 320 μm of application twice epoxy universal primer.
Wherein, step（3）In b, 4 pieces of simulation ballast tank models are prepared, 1 piece is used for bottom plate cathodic disbonding, and 1 piece is used for top plate
20 DEG C/50 DEG C temperature alternatings, the model of 2 pieces plus U-type groove are respectively used to cooling and without cooling side plate experiment, test period totally 180
It.
The present invention is used to detect ballast tank of ship and its piping protective coating, in different residual chlorine concentration electrolytic tensions carry water
Performance.This test method is related to the electrolysis unit of natural sea-water, the preparation method of different residual chlorine concentration electrolytic seawaters, coating in chlorine
Change the test method in seawater, and is existed to ballast tank of ship and its piping protective coating using the chamber of seawater sagregated ballast tanker
The method tested in chlorination seawater protects ballast tank of ship and its piping to evaluate electrolysis ballast water treatment system
The influence degree of coating performance.
Advantageous effect：The present invention prepares chlorination seawater using self-control electrolytic seawater device, is used for ballast tank of ship and its pipe
It is protective coating experiment, influence degree of the research electrolytic seawater to ballast tank of ship and its piping protective coating.The present invention can be with
Meet in experiment indoor test ship protective coating especially ballast tank of ship and its piping protective coating, in electrolytic seawater
Performance change so as to shorten the coating R＆D cycle, improves detection efficiency, has important practical significance.
Description of the drawings
Fig. 1 is the schematic diagram of electrolytic seawater device of the present invention；In figure：1, electrolytic cell, 2, motor, 3, rabbling mechanism, 4, permanent
Potentiometer.
Fig. 2 is in embodiment 1, and under natural sea-water and the electrolytic seawater that residual chlorine concentration is 15ppm, coating cut is removed with examination
Test the variation diagram of time；
Fig. 3 is in embodiment 1, and under natural sea-water and the electrolytic seawater that residual chlorine concentration is 15ppm, coated cathode protects the matter of spelter
Amount loses the figure that changes with time；
Fig. 4 and Fig. 5 be embodiment 2 in, coating system B residual chlorine concentration be 0ppm natural sea-water in electrochemical impedance spectrogram with
The variation diagram of time；
Fig. 6 and Fig. 7 is coating system B electrochemical impedance spectrograms in the electrolytic seawater that residual chlorine concentration is 15ppm in embodiment 2
Change with time figure；
Fig. 8 is in embodiment 2, and under natural sea-water and the electrolytic seawater that residual chlorine concentration is 15ppm, coating system B water absorption rates are at any time
Between variation diagram.
Specific implementation mode
The present invention is further explained in the light of specific embodiments, so that those skilled in the art can be better
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
It is electrolysed the test method of ballast tank and its piping coating performance under ballast water environment, is included the following steps：
（1）, by electrolytic seawater device, prepare electrolytic seawater；It is electrolytic seawater is closed, be kept in dark place after the completion of preparation；Its
In, electrolytic seawater device includes containing the electrolytic cell of natural sea-water, potentiostat and motor-driven and be placed in electrolytic cell
In rabbling mechanism, the cathode and anode of potentiostat are dipped in the natural sea-water of electrolytic cell.Wherein, rabbling mechanism can be existing
There is well known liquid medium rabbling mechanism, belongs to known technology with the connection structure of the motor as power source, herein no longer
It repeats.
（2）, electrolytic seawater mixed with natural sea-water according to different proportion, electrolytic seawater concentration is carried out by iodimetric titration
Titration, prepares the electrolytic seawater of different residual chlorine concentrations；
（3）, in the electrolytic seawater of different residual chlorine concentrations, respectively carry out soak test and PSPC simulation ballast tank experiment；
A, soak test：It takes test piece, after cut, is soaked in respectively in the electrolytic seawater of different residual chlorine concentrations, in experiment the
1,2,3,4,5,6 months when, whether the coating observed on test piece blisters, and the water suction of the coating on testing experiment model
Rate, cut stripping, cathodic protection spelter mass change, are carried out at the same time electrochemical impedance spectroscopy（EIS）Test；
B, PSPC simulates ballast tank experiment：Modulus intends ballast tank model, according to IMO《Ballast tank of ship protective coating performance mark
It is accurate》, top cut, side plate are carried out without cooling, side plate cooling and bottom plate cathodic disbonding using seawater sagregated ballast tanker chamber
Experiment, after the test, the resistance to cathodic disbonding performance of testing coating.
The present invention is electrolysed natural sea-water by seawater electrolysis device（As shown in Figure 1）, under certain voltage, pass through control
Electrolysis time prepares the electrolytic seawater of high residual chlorine concentration, obtained after the seawater of higher residual chlorine concentration is mixed with natural sea-water compared with
The natural sea-water of low concentration chlorine residue, to generate the electrolytic seawater of different residual chlorine concentrations, residual chlorine concentration is carried out by titration
It measures.After being titrated to electrolytic seawater concentration by iodimetric titration, the electrolytic seawater of different residual chlorine concentrations is prepared.
The seawater for taking different residual chlorine concentrations carries out every speeding-up simulation experiment, more than investigation to ballast tank and piping coating
Chlorine influences the performance of coating.
Electrolysis ballast water treatment system at work, will produce certain density hypochlorous acid, sodium hypochlorite isoreactivity object
Matter, and aqueous bio is killed with this, in the ballast water treatment system course of work, needing the residual chlorine concentration in guarantee water to be in has
Imitate range.Therefore, during the test, the residual chlorine concentration in periodic monitoring experiment casing in electrolytic seawater and timely update, with
The continuity and accuracy of guarantee test condition.
Wherein, step（3）In a, it is 150mm × 70mm × 2mm, spray that the ground of test piece, which selects Q235 carbon steels, size,
Sand is to Sa2.5 grades of cleannes, 30-50 μm of roughness, 320 μm of application twice epoxy universal primer.
Wherein, step（3）In b, simulation ballast tank model ground select Q235 carbon steels, size be 400mm × 200mm ×
3mm, sandblasting to Sa2.5 grades of cleannes, 30-50 μm of roughness；One of inorganic primer for zinc silicate shop of first application, thickness 15-
20 μm, 2 months outdoor exposures are carried out, after low pressure washing, then 320 μm of application twice epoxy universal primer.Step（3）In b, prepare
4 pieces of simulation ballast tank models, 1 piece is used for bottom plate cathodic disbonding, and 1 piece is used for 20 DEG C/50 DEG C temperature alternatings of top plate, 2 pieces plus U-type groove
Model be respectively used to it is cooling and without cooling side plate experiment, test period totally 180 days.
Embodiment 1
Coating model is subjected to soak test and simulation ballast in the electrolytic seawater of natural sea-water and different residual chlorine concentrations respectively
Cabin is tested, and coating model performance change situation is compared, to study influence degree of the electrolytic seawater to ballast tank coating.
（1）Step is carried out according to above-mentioned requirements（3）The experiment of a, is soaked in natural sea-water by test piece respectively（Chlorine residue is dense
Degree is 0ppm）And in the electrolytic seawater that residual chlorine concentration is 15ppm, test temperature is room temperature.In experiment the 1st, 2,3,4,5,6
When the moon, the cut stripping of difference testing coating, cathodic protection spelter quality change situation.Wherein, the cut peel results of coating
As shown in table 1 and Fig. 2；Coated cathode protects the mass loss of spelter as shown in table 2 and shown in Fig. 3.It can also carry out adhesive force
It is tested with cathodic disbonding.
1 coating cut of table removes width（mm）
Table 1 is that coating cut removes width, as seen from Figure 1：Cut removes the variation with test period.Either natural
Still in the electrolytic seawater that residual chlorine concentration is 15ppm, cut stripping width increases with the extension of test period seawater, and
The presence of chlorine residue can accelerate the generation that coating cut is removed in electrolytic seawater.
2 coated cathode of table protects spelter mass loss（g）
Table 2 provides the mass loss data of cathodic protection spelter for coating, makees Fig. 3 according to table 2：Spelter mass loss is at any time
Variation.As seen from Figure 3, with the increase of test period, spelter mass loss is presented substantially with the increase of test period
Increased trend, all in all, matter of the mass loss of spelter more than spelter in the electrolytic seawater containing chlorine residue in natural sea-water
Amount loss, this is because in the electrolytic seawater containing chlorine residue, the oxidative components such as hypochlorous acid can dissolve sacrificial anode surface zinc
Corrosion product, so that sacrificial anode surface-active point is more exposed；And in natural sea-water, it is produced since a large amount of zinc aoxidize
The case where attachment of object causes sacrificial anode surface-active point to reduce, causes " big cathode, primary anode ", disappear to accelerate anode
Consume rate.Therefore it is found that when carrying out cathodic protection using sacrificial anode method, the electrolytic seawater containing chlorine residue can make zinc sacrifice sun
The consumption of pole reduces.
（2）According to above-mentioned steps（3）B carries out the experiment of coating PSPC ballast tanks, and test piece ground selects Q235 carbon steels, mould
Quasi- ballast tank size of sample is 400mm × 200mm × 3mm, sandblasting to Sa2.5 grades of cleannes, 30-50 μm of roughness.First application 1
Road inorganic primer for zinc silicate shop, thickness are 15-20 μm, carry out 2 months outdoor exposures.After low pressure washing, then application bipassage ring
320 μm of oxygen universal primer.
In natural sea-water and the electrolytic seawater of different residual chlorine concentrations, PSPC simulation ballast tank experiments are carried out.To each experiment
Condition, 1 piece is used for bottom plate cathodic disbonding, and 1 piece is used for 20 DEG C/50 DEG C temperature alternatings of top plate, and 2 pieces add the model of U-type groove to use respectively
In cooling and without cooling side plate experiment, test period totally 180 days；Each experimental condition prepares 4 pieces of models, wherein 2 pieces plus U-shaped
Slot, 2 kinds of experimental conditions totally 8 pieces of models.
Experimental condition：Experiment is according to International Maritime Organization（IMO）Maritime Safety Committee（MSC）215. (82) resolution basis
The Convention on the Life Safety at Sea of revision（SOLAS）II -1/3-2 of clause by《The special seawater ballast tank of ship and bulk freighter are double
Topside place protective coating performance standard》（Abbreviation PSPC）In attachment《The special seawater ballast tank of all types ship and bulk goods
The coating qualification test program of used coating at the double topsides of ship》It carries out.
PSPC test results：Table 3 is that PSPC tests cathodic disbonding result.By cathodic disbonding radius data in table 3 it is found that
In natural sea-water, cathodic disbonding radius is 26.0mm；In the electrolytic seawater that residual chlorine concentration is 15ppm, cathodic disbonding radius is
38.0mm illustrates that excessively high residual chlorine concentration can dramatically increase the cathodic disbonding radius of coating.
3 PSPC of table tests cathodic disbonding result
Analysis of experimental results：
（1）The presence of chlorine residue can accelerate the generation that coating cut is removed in natural sea-water, reduce the wear rate of zinc sacrificial anode.
（2）Excessively high residual chlorine concentration can dramatically increase the cathodic disbonding radius of coating in natural sea-water.
（3）Influence using present invention detection electrolytic seawater to ballast tank and its piping protective coating, can show that coating exists
The marked difference of performance in natural sea-water and electrolytic seawater illustrates the feasibility of the present invention.
Requirement according to the present invention selects corrosion-inhibiting coating model to carry out ballast tank of ship and its experiment of piping protective coating.
By in natural sea-water and chlorination seawater, model cut stripping, zinc sacrificial anode mass change, cathodic disbonding situation of change
Test, the influence degree that research electrolytic seawater tests ballast tank of ship and its piping protective coating.Test result shows the survey
Method for testing, which can be used to study electrolytic seawater, influences ballast tank and its piping coating, and excessively high chlorine residue can be to coating in natural sea-water
Performance impacts.
Embodiment 2
Currently, the evaluation to coating protection performance, other than the macroscopic tokens such as adhesive force, cut, cathodic disbonding, using electrochemistry
It is related with corrosion process that technology such as electrochemical impedance spectral technology can apply layer absorbent, coating resistance, capacitance etc. with effective evaluation
Parameter.
It is+2 general bottom of road epoxy of zinc-rich coating to select typical vessel corrosion-inhibiting coating-coating system B, coating system B
Paint.
It is prepared into intact sample and cut sample respectively.Wherein intact sample investigates permeability shadow of the electrolytic seawater to coating
It rings, cut sample investigates coating under the conditions of breakage, and electrolytic seawater is on influences such as the corrosion of coating adhesion, steel ground sprawlings.
Step is carried out according to above-mentioned requirements（3）The experiment of a, is soaked in natural sea-water by test piece respectively（Residual chlorine concentration is 0ppm）And
Residual chlorine concentration is in the electrolytic seawater of 15ppm, and test temperature is room temperature.By in the different tests stage（Respectively the 1st, 2,
3,4,5,6 months）, whether testing coating blister, adhesive force situation of change and the electrification by electrochemical impedance spectroscopy testing coating
Performance is learned, to influence of the Comprehensive Evaluation electrolytic seawater to intact coating.It is main in addition to conventional visual examination for cut sample
It will be by situations such as metal erosion sprawling, coating stripping, determining the electrolytic seawater of different residual chlorine concentrations to antiseptic property at cut
Influence.
PSPC experiments are International Maritime Organizations about ballast tank of ship coating peremptory norm, it is desirable that all ballast tank coatings must
It must be tested by laboratory speeding-up simulation.Therefore, it is extremely important to carry out the coating PSPC performances influence research under electrolytic seawater.This
Embodiment selects a set of coating system-coating system B tested by PSPC, respectively in natural sea-water and electrolytic seawater into
Row simulation ballast tank experiment, compares under two kinds of experimental conditions, the stripping of coating model cut, cathodic disbonding, adhesive force and electric current
The situations of change such as demand, to study the influence degree that electrolytic seawater tests ballast tank coating PSPC.
It is prepared by the laboratory of different residual chlorine concentration electrolytic seawaters：It is electrolysed natural sea-water using electrolysis, in certain voltage
Under, by controlling electrolysis time, the electrolytic seawater of higher residual chlorine concentration is prepared, by the seawater and natural sea-water of higher residual chlorine concentration
The natural sea-water of low concentration chlorine residue is obtained after mixing, residual chlorine concentration is monitored by iodometric titrationiodimetry titration.Residual chlorine concentration is electrolysis
Actual concentrations when ballast water treatment system works, reach 15mg/L.
Performance difference of the quantitative assessment coating in electrolytic seawater and natural sea-water such as water absorption rate, and pass through electrochemical impedance
Spectrum（EIS）Technology evaluates the parameters related with corrosion process such as coating compactness, coating resistance, coating capacitor, comprehensive assessment electricity
Solving seawater influences the performance of coating.Coating system B Impedance Membrane values change over time that the results are shown in Table 4；Coating system B water suctions
The results are shown in Table 5 for rate.Fig. 4 is that electrochemical impedance spectrogram is at any time in the natural sea-water that residual chlorine concentration is 0ppm by coating system B
Between variation diagram, Fig. 5 be Fig. 4 partial enlarged view；Fig. 6 is coating system B electric in the electrolytic seawater that residual chlorine concentration is 15ppm
Chemical impedance spectrogram changes with time figure, and Fig. 7 is the partial enlarged view of Fig. 6；Fig. 8 is natural sea-water and residual chlorine concentration is
Under the electrolytic seawater of 15ppm, coating system B water absorption rates change with time figure.
4 coating system B Impedance Membrane values of table change over time（Ω）
5 coating system B water absorption rates of table
At first 5 months of experiment it can be seen from Fig. 4 and Fig. 5, coating system B coatings show as a capacitive reactance arc property, resistance
Anti- value is 106The Ω orders of magnitude fluctuate up and down, and in off-test, coating impedance value rises to 108The Ω orders of magnitude, Nyquist scheme still
A capacitive reactance arc property is shown as, illustrates that coating is intact at this time.Impedance magnitude can with the shielding properties of reaction coating, it is general and
Speech：Impedance magnitude is higher, and it is better to represent coating shield performance.
By coating system B it can be seen from Fig. 6 and Fig. 7 after impregnating 1 month, coating impedance value drops to 106Ω quantity
Grade, at subsequent 2-6 months, coating impedance value was always held at 107The Ω orders of magnitude all show an appearance in whole experimental stage
Anti- arc illustrates that coating performance is intact.
Make Fig. 8 according to table 5, under different residual chlorine concentrations, coating system B water absorption rates can be with by table 5 with the variation of test period
Find out, be negative value in the water absorption rate of entire experimental stage, coating system B, illustrates that the net quality of coating constantly reduces, due to coating
In the seawater, the quality that color stuffing dissolves in coating is more than the absorbed water of coating to the constantly dissolving of the solubility such as middle aluminium powder color stuffing
Quality, it is negative value to eventually lead to water absorption rate.As seen from Figure 8：Coating system B water absorption rates are in the increase of test period
Linear rule reduces, and illustrates that color stuffing is dissolved with stable rate from coating in coating.
The present invention is tested by carrying out ballast tank coating PSPC in natural sea-water and electrolytic seawater, qualitative assessment coating sample
The differences such as the stripping of plate cut, cathodic disbonding, so that it is determined that influence degree of the electrolytic seawater to ballast tank coating PSPC performances.
Above example is in order to illustrate technical scheme of the present invention, and the purpose is to be to enable those skilled in the art
Understand present disclosure and be practiced, but is not limited the scope of the invention with this.Every reality according to the present invention
The equivalent changes or modifications that matter content is made should all cover within the scope of the present invention.
Claims (5)
1. being electrolysed the test method of ballast tank and its piping coating performance under ballast water environment, which is characterized in that including following step
Suddenly：
（1）, by electrolytic seawater device, prepare electrolytic seawater；It is electrolytic seawater is closed, be kept in dark place after the completion of preparation；
（2）, electrolytic seawater mixed with natural sea-water according to different proportion, electrolytic seawater concentration is dripped by iodimetric titration
It is fixed, prepare the electrolytic seawater of different residual chlorine concentrations；
（3）, in the electrolytic seawater of different residual chlorine concentrations, respectively carry out soak test and PSPC simulation ballast tank experiment；
A, soak test：
It takes test piece, after cut, is soaked in respectively in the electrolytic seawater of different residual chlorine concentrations, in experiment the 1st, 2,3,4,5,6
At a month, whether the coating observed on test piece blisters, and the stripping of the water absorption rate of the coating on testing experiment model, cut,
Cathodic protection spelter mass change is carried out at the same time electrochemical impedance spectroscopy test；
B, PSPC simulates ballast tank experiment：
Modulus intends ballast tank model, according to IMO《Ballast tank of ship protective coating performance standard》, tried using seawater sagregated ballast tanker
Tryoff carries out top cut, side plate without cooling, side plate cooling and bottom plate cathodic disbonding experiment, after the test, testing coating
Resistance to cathodic disbonding performance.
2. the test method of ballast tank and its piping coating performance under electrolysis ballast water environment according to claim 1,
It is characterized in that：Step（1）In, electrolytic seawater device includes containing the electrolytic cell of natural sea-water, potentiostat and by motor band
Dynamic and be placed in the rabbling mechanism in electrolytic cell, the cathode and anode of potentiostat are dipped in the natural sea-water of electrolytic cell.
3. the test method of ballast tank and its piping coating performance under electrolysis ballast water environment according to claim 1,
It is characterized in that：Step（3）In a, it is 150mm × 70mm × 2mm that the ground of test piece, which selects Q235 carbon steels, size, and sandblasting is extremely
Sa2.5 grades of cleannes, 30-50 μm of roughness, 320 μm of application twice epoxy universal primer.
4. the test method of ballast tank and its piping coating performance under electrolysis ballast water environment according to claim 1,
It is characterized in that：Step（3）In b, it is 400mm × 200mm × 3mm that the ground of simulation ballast tank model, which selects Q235 carbon steels, size,
Sandblasting is to Sa2.5 grades of cleannes, 30-50 μm of roughness；One of inorganic primer for zinc silicate shop of first application, thickness are 15-20 μm,
2 months outdoor exposures are carried out, after low pressure washing, then 320 μm of application twice epoxy universal primer.
5. the test method of ballast tank and its piping coating performance under electrolysis ballast water environment according to claim 1,
It is characterized in that：Step（3）In b, 4 pieces of simulation ballast tank models are prepared, 1 piece is used for bottom plate cathodic disbonding, and 1 piece is used for top plate 20
DEG C/50 DEG C of temperature alternatings, 2 pieces add the model of U-type groove to be respectively used to cooling and tested without cooling side plate, test period totally 180 days.
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| CN201810093137.4A CN108344681A (en) | 2018-01-31 | 2018-01-31 | It is electrolysed the test method of ballast tank and its piping coating performance under ballast water environment |
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| CN201810093137.4A CN108344681A (en) | 2018-01-31 | 2018-01-31 | It is electrolysed the test method of ballast tank and its piping coating performance under ballast water environment |
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| US9606076B2 (en) * | 2010-12-21 | 2017-03-28 | Axalta Coating Systems Ip Co., Llc | Process for evaluating corrosion resistance of coating |
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| CN101804401A (en) * | 2010-03-29 | 2010-08-18 | 扬帆集团股份有限公司 | Painting method of seawater ballast tank |
| US9606076B2 (en) * | 2010-12-21 | 2017-03-28 | Axalta Coating Systems Ip Co., Llc | Process for evaluating corrosion resistance of coating |
| CN104950025A (en) * | 2015-06-23 | 2015-09-30 | 中国船舶重工集团公司第七二五研究所 | Array testing device for monitoring coating cathodic disbanding tests |
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