CN103088324A - Phosphating solution for corrosion prevention of iron towers and preparation method thereof - Google Patents
Phosphating solution for corrosion prevention of iron towers and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a phosphating solution for corrosion prevention of iron towers and a preparation method thereof. The phosphating solution is prepared by using the following raw materials: 180-185 ml/L of phosphoric acid, 60-65 ml/L of ethanol, 3.0-3.5 ml/L of OP-10, 5.0-6.5 g/L of zinc oxide, 1.5-2.0 g/L of CUT-052, 2.5-3.5 g/L of nickel nitrate, 10.0-14.0 ml/L of NCE-C01, 1.5-2.0 g/L of sodium chlorate, and 1.5-2.0 g/L of NaF. According to the invention, operations of cleaning, rust-layer transformation, zinc-layer phosphorization and surface adjustment can be completed in one step; and the phosphating solution carries out rusty phosphorization and rust-layer transformation on iron towers, the construction process is simple, and the corrosion prevention effect is good.
Description
Technical field
The present invention relates to a kind of Phosphating Solution and preparation method thereof, relate in particular to a kind of for electric power circuit steel tower rot-resistant Phosphating Solution and preparation method thereof.
Background technology
Iron tower of power transmission line adopts pot galvanize plain carbon stool material, part hot galvanizing surface corrosion in its operational process, the complete corrosion failure of zinc coating when serious, the safe operation that jeopardizes transmitting line.Therefore, the corrosion electric power pylon need carry out regular anticorrosive coating processing.Traditional surface treatment method is artificial rust cleaning or pickling post coat.Artificial rust cleaning or pickling not only destroy protective layer---the zinc layer on steel tower surface, and can cause environmental pollution.Two kinds of methods all are difficult to thorough rust cleaning, and easily return rust, wrinkling, after processing, steel tower be there is no to provide protection.And painted surface adheres to badly, outer with easy to foaming after the stop-off lacquer dress, the protection cycle is shorter.So; how rusty scale is converted into to good protective membrane; improve itself and the sticking power of painting; strengthen barrier propterty; the process for treating surface of research corrosion steel tower; determine suitable process of surface treatment according to corrosion degree and the atmospheric environment of steel tower, guarantee that anticorrosive coating effect and cycle are necessary, there is important practical and be worth and theory significance.
The key of the anticorrosive coating technology of corrosion steel tower is the treatment technology of the front rusty surface of application.Usually, the process for treating surface before application comprises: 1. mechanical process (as sand-blast etc.), 2. chemical cleaning method (as acid wash etc.), 3. rusty scale conversion etc.There is certain difficulty in construction in the wild.And 1., 2. the kind method is not suitable for the not too serious zinc-plated steel tower of corrosion degree, because they can remove Zinc coat fully.On surface, uncorroded zinc coating still has good provide protection, and painting anticorrosion coating on zinc coating, can make coating and Coating process composite protection layer, and preservative effect is fine.Rusty scale transforms and usually adopts then phosphatization of Phosphating Solution clean surface, but current phosphatize phosphate coat can return white phenomenon for a long time under strong sunshine, affects sticking power, need at least be coated with one priming paint in 16 hours after the phosphatize phosphate coat surface drying, has restricted its application.Therefore, need exploitation effectively rusty scale and zinc coating one step to be converted into to protective layer, paint good attachment, long, the effective steel tower process for treating surface of protection period at normal temperatures.
Summary of the invention
Problem to be solved by this invention is the defect that overcomes prior art, provides a kind of for steel tower rot-resistant Phosphating Solution, and described Phosphating Solution can make to clean, rusty scale transforms, zinc layer phosphatization and surface are adjusted a step and completed.To remove the oxide skin of metallic surface, Surface Creation phosphatize phosphate coat protective layer, the resistance to corrosion of raising metal.In addition, the present invention also will further provide the preparation method of described Phosphating Solution.
Technical problem of the present invention is realized by following technical scheme.
A kind of for steel tower rot-resistant Phosphating Solution, its 1L Phosphating Solution adopts the raw material of following proportioning to make:
Phosphoric acid (concentration expressed in percentage by volume 85%
,v/V, lower same) 180 ~ 185 ml,
Ethanol (concentration expressed in percentage by volume 85%, V/V, lower same) 60 ~ 65 ml,
OP－10 3.0~3.5 ml，
Zinc oxide 5.0 ~ 6.5 g,
CUT-052 1.5~2.0g，
Nickelous nitrate 2.5 ~ 3.5 g,
NCE-C01 10.0~14.0 ml，
Sodium chlorate 1.5 ~ 2.0g,
NaF 1.5~2.0g，
Water surplus.
Above-mentioned for steel tower rot-resistant Phosphating Solution, at ambient temperature, pH is 0.43 to described Phosphating Solution, and free acidity (FA) is 230 points, and total acidity (TA) is 480 points.
A kind ofly prepare the above-mentioned method for steel tower rot-resistant Phosphating Solution, prepared by described Phosphating Solution as follows:
(1) ethanol is added in the 1L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 1L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Of the present invention for steel tower rot-resistant Phosphating Solution, its key is by add suitable promotor and sequestrant in phosphorization agent, has improved the speed that generates the salt film, has strengthened phosphorus characteristic, and rusty scale conversion and zinc layer phosphatization one step are completed.Solved traditional brushing type phosphorization agent surface problem that easily dust, enamelled coating are difficult for adhering to.
It has following characteristics:
1) fast filming at ambient temperature
Due to the electric power pylon construction of prevention work in the wild, the large-scale heating installation of Portable belt not, and it is shorter with the duration of contact on steel tower surface to brush the processing requirement Phosphating Solution, therefore how to make Phosphating Solution in short-term under normal temperature fast filming be key.
In order to make Phosphating Solution fast filming at ambient temperature, tested multiple promotor.Finally determine that through great many of experiments nickelous nitrate is film forming accelerating.Ni
2+can promote the generation at the primary stage phosphatize phosphate coat.Experimental results show that as Ni (NO
3)
2during for 3.5g/L, the formation speed of phosphatize phosphate coat significantly improves, and the bubble produced in parkerizing process obviously reduces, and phosphatize phosphate coat is Dark grey, and surface is dust not, and corrosion resisting property is good.And do not add Ni
2+the time or the phosphatize phosphate coat that generates when not enough of its add-on be light gray, corrosion resisting property is poor, often there is the dust phenomenon on surface.
In addition, also in Phosphating Solution, add oxidation promotor-sodium chlorate, made the hydrogen atom of nascent state be oxidized to water, strengthened the surface-area in cathodic area, thereby promoted generation and the development of phosphate crystal process, accelerated film process.
2) rusty scale transforms
The sticking power of paint film mainly is subject to the impact of Surface Rust, because rusty scale can continue to react with the corrosive deposit of infiltration paint film, generates the compound of various iron, zinc, makes its volumetric expansion, causes pull-away.Therefore rusty scale is converted into to phosphatize phosphate coat, has strengthened the sticking power of paint film, make again the resistance to corrosion of metallic surface improve, avoided the corrosion under the film.
For rusty scale thoroughly is converted into to phosphatize phosphate coat, added a kind of organic sequestering agent in Phosphating Solution.It can with rusty scale in main component ferric oxide generation chemical reaction, form stable cancellated coordination compound, thereby make iron rust effectively be converted into the rete with protectiveness, and combine with the iron-based body securely.Not adding the rusty scale conversion film that the Phosphating Solution of sequestrant generates is brown, the surface irregularity porous, and resistance to corrosion is poor, almost there is no changing effect; Adding the rusty scale conversion film that the Phosphating Solution of sequestrant generates is black, smooth surface, and resistance to corrosion is strong, and good with outer paint film adhesion.
3) zinc phosphide layer under high acidity
The higher acidity of dissolving needs due to rusty scale, therefore the acidity of required Phosphating Solution is higher, the pH that records Phosphating Solution is 0.43, free acidity (FA) is 230 points, total acidity (TA) is that (FA of traditional zinc layer Phosphating Solution is 2.5 points to 480 points, TA is 25 points), the FA of Phosphating Solution and TA are respectively 92 times and 19 times of conventional phosphatizing liquid.
But the higher meeting of acidity is accelerated zinc layer and Phosphating Solution speed of response, dissolves a part of zinc layer, produces a large amount of hydrogen, causes zinc layer attenuate, and the phosphatize phosphate coat generated is imperfect, the remained on surface bubble.Through great many of experiments, determined a kind of high-efficient corrosion inhibitor CUT-052.In Phosphating Solution, add CUT-052 can obviously reduce the effect of its corrosion zinc layer, the bubble generated in parkerizing process is obviously reduced.In addition, when guaranteeing that Phosphating Solution can effectively transform rusty scale and zinc phosphide layer, add ZnO to reduce the acidity of Phosphating Solution.
The singularity of 4) pot galvanize phosphatization
For the pot galvanize steel, in order to make the zinc-plated surperficial glossiness of easily carrying out and increase, generally all add some aluminium, therefore, there is aluminum oxide segregation layer in its surface, and Al
3+be to endanger larger negative contact agent, when the content when it in Phosphating Solution surpasses 0.5g/L, phosphatize phosphate coat just grows dim, inhomogeneous, or stops film forming fully.
In order to eliminate Al
3+impact, add NaF in derusting phosphating liquor, make the Al be dissolved out
3+generate insoluble Na
3alF
6be deposited in rete and go, thereby eliminate Al
3+negative catalysis.
5) cleaning, surface are adjusted, rusty scale transforms and zinc layer phosphatization one step completes
Traditional phosphating process is: degreasing → washing → rust cleaning → washing → surface adjustment → phosphatization → wash → dry.Complex process.Regulate by experiment the add-on of all ingredients, add OP-10 tensio-active agent simultaneously, finally determine the composition and engineering of derusting phosphating liquor, cleaning, rusty scale conversion, zinc layer phosphatization and surface are adjusted a step and are completed.
Described Phosphating Solution is converted into phosphate coating by rusty scale, zinc layer phosphatization is generated to the double salt protective membrane, no simultaneously
Only steel tower is had to provide protection, and strengthened the sticking power of paint film.By theoretical investigation and great many of experiments, determined a kind of efficient Phosphating Solution formula, make cleaning, rusty scale conversion, zinc layer phosphatization and surface adjust a step and complete.To steel tower, be with rust phosphatization, rusty scale to transform, construction technology is simple.
The accompanying drawing explanation
Fig. 1 is constant potential anodic polarization curves figure.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further details.
Embodiment 1 Phosphating Solution composition of the present invention primary election experiment of single factor
Site technique require Phosphating Solution used should be at normal temperatures can fast filming (rusty scale transforms, zinc layer phosphatization), rust cleaning, parkerizing process one step complete.The triturating initial stage is with H
3pO
4, ZnO, H
2o is base soln, adds different promotor and sequestrant to prepare different Phosphating Solutions, does the single-factor variable experiment, determines one by one suitable additive and consumption.Observe color and the surperficial dust situation thereof of rusty scale conversion film and zinc layer phosphatize phosphate coat; the rusty scale conversion film should be black; zinc layer phosphatize phosphate coat should be Dark grey; two kinds of protective membrane surfaces should be without the dust phenomenon; in addition with its corrosion resisting property of cupric sulphate dropping test (GB6807-86) quick test, thereby determine suitable promotor and sequestrant.
Through this experiment of single factor, tentatively determine that the moiety of Phosphating Solution and its consumption are as follows:
Phosphoric acid (85%) 150～200ml/L,
Ethanol (85%) 60～70ml/L,
OP-10(industry) 3.0～3.5ml/L,
Zinc oxide 4.0～8.0g/L,
CUT-052 1.0～2.0g/L，
Nickelous nitrate 1.5～3.5g/L,
NCE-C01 5.0～14.0ml/L，
Sodium chlorate 1.0～2.5g/L,
NaF 1.0～2.0g/L，
Embodiment 2 Phosphating Solution orthogonal experiment of the present invention
According to the experiment of single factor acquired results, formulate orthogonal array, select 3 levels of 7 kinds of factors to do orthogonal experiment, take cupric sulphate dropping test as the corrosion proof method of quick test rusty scale conversion film, take its solidity to corrosion as leading indicator, the film of zinc layer phosphatize phosphate coat of take is heavily reference, determines and optimizes reagent dosage.Orthogonal design table and experimental result are in Table 1.
Table 1 orthogonal design table and experimental result
Can use the description level of factor of graph direct and the relation between index, during mapping, X-coordinate is got the actual value of each level of factor, and ordinate zou is got the corresponding average (K of this factor
1, K
2, K
3), connect point into line.
According to the extreme difference of copper sulfate drop time gained, compositing factor on the impact of phosphatization is sequentially: C>E>D>G>F>A>B.According to the extreme difference of the heavy gained of film, compositing factor on the impact of phosphatization is sequentially: B>C>A>F>E>G>D.The phosphate coating viscosity generated when phosphoric acid is 200ml/L is too high, and time of drying is oversize, and while comparing 180ml/L, corrosion resisting property improves little, therefore selects A
2; Zinc oxide is little on the corrosion resisting property impact of rusty scale conversion film, when content is 8.0g/L, the dust phenomenon can occur, and for regulating the acidity of Phosphating Solution, selects B
2.Consider and can show that the Phosphating Solution formula is: A
2b
2c
3d
3e
3f
3g
3.
Phosphating Solution formula and processing parameter are:
Phosphoric acid (85%) 180 ~ 185 ml/L,
Ethanol (85%) 60 ~ 65 ml/L,
OP－10 3.0~3.5 ml/L，
Zinc oxide 5.0 ~ 6.5 g/L,
CUT-052 1.5~2.0g/L，
Nickelous nitrate 2.5 ~ 3.5 g/L,
NCE-C01 10.0~14.0 ml/L，
Sodium chlorate 1.5 ~ 2.0g/L,
NaF 1.5~2.0g/L。
pH 0.43，
Free acidity (FA) 230 points,
Total acidity (TA) 480 points,
The temperature environment temperature,
Using method is brushed.
Embodiment 3 Phosphating Solution single-factor variable experiment of the present invention
For the impact of further each component of clear and definite Phosphating Solution on phosphorus characteristic, done the single-factor variable experiment of Phosphating Solution, show that each component is as follows on the impact of Phosphating Solution performance:
(1) phosphoric acid.Phosphoric acid is the non-volatile non-oxidizable weak acid of three grades of ionization, carries out fractional ionization in the aqueous solution, is the chief component of Phosphating Solution.When phosphoric acid contacts with the zinc layer with rusty scale, can generate normal salt, hydrogen salt, the dihydric salt three class phosphoric acid salt of ferrous iron, iron and zinc.Hydrophosphate and phosphoric acid salt indissoluble, become rete, and dihydrogen phosphate is converted into hydrogen salt, normal salt two class phosphoric acid salt very soon with weakening of acidity in time, enters rete.The existence of phosphoric acid both provided acidic conditions, made again the Fe in solid-state rusty scale
2+with Fe
3+with the Zn in the zinc layer
2+free out these ion parts and phosphatase reaction generate the phosphate layer of indissoluble, and another part offers sequestrant as central ion and carries out chelating.
Experiment shows, when phosphorus acid content is less, the speed of response of Phosphating Solution and zinc layer is suitable, the phosphatize phosphate coat generated is fine and close continuously, protection effect is good, but slow with the speed of response of rusty scale, and the corrosion thing of specimen surface is difficult to Ex-all, can form second-rate white phosphate layer on remaining corrosion thing surface, not have good provide protection; When content is higher, rusty scale transforms fully, generates the measured black phosphate layer of matter, but now the speed of response of Phosphating Solution and zinc layer is very fast, and the phosphatize phosphate coat of generation is imperfect, and, because viscosity is larger, time of drying is longer.Therefore will strictly control the add-on of phosphoric acid while preparing Phosphating Solution, experiment shows, regardless of the corrosion degree of transmission tower, its content all should be controlled at 180 ~ 185ml/L and be advisable.
(2) zinc oxide.Zn
2+be the main film forming ion of phosphatization, its concentration is a key factor that affects phosphorization film quality.Film forming difficulty when its mass concentration is too low; When too high, the phosphatize phosphate coat crystallization is thicker, when serious, the dust phenomenon occurs, affects the sticking power of paint film.Due to what process, be the pot galvanize shaft tower of corrosion, itself can dissolve Zn the zinc layer
2+, so the consumption of zinc oxide is not high, experiment determines that concentration is 5.0 ~ 6.5g/L.
（3）CUT-502。It is composite sequestrant, can with rusty scale in the main component ferric oxide form stable cancellated coordination compound, make iron rust effectively be converted into the rete with protectiveness, with the iron-based body, combine securely.It has complexing action to iron, zine ion in solution simultaneously, and two kinds of ionic concns are kept within the specific limits, reduces sediment weight, the crystallization of refinement phosphatize phosphate coat.Not adding the rusty scale conversion film that the derusting phosphating liquor of sequestrant generates is brown, surface irregularity, and resistance to corrosion is poor; The rusty scale conversion film generated while adding sequestrant is black, smooth surface, and resistance to corrosion is strong.The solidity to corrosion of phosphatize phosphate coat is relevant with sequestrant concentration, and too much sequestrant can make the Phosphating Solution muddiness.Optimum concn is 1.5～2.0g/L.
（4）NCE-C01。Be a kind of effective phosphatization nucleator, it can effectively suppress the corrosive nature of derusting phosphating liquor to the zinc layer simultaneously, obviously reduces the bubble produced in parkerizing process, makes the phosphatize phosphate coat densification continuously generated, and resistance to corrosion is strong.It and nickelous nitrate are used in conjunction with quality and the speed that can obviously improve phosphatization.Can cause phosphate layer surface dust when it during by quantity not sufficient, affect paint film adhesion.Its add-on the best is 10 ~ 14.0ml/L.
(5) nickelous nitrate.Ni
2+form a large amount of nucleus at specimen surface, thereby increase active site, promote film forming, crystallization of refinement, the phosphatize phosphate coat generated has lower chemically reactive.With without the nickel phosphatization relatively, increased the secondary sticking power of solidity to corrosion and coating.Add-on the best is 2.5 ~ 3.5g/L.
(6) sodium chlorate." galvanic corrosion reaction comprehensively " carried out in the low temperature phosphor reaction on metallic surface.The effect of sodium chlorate comes from the oxygenizement of oxidizing substance to hydrogen atom, and after hydrogen atom is oxidized to water, polarized action is eliminated, and has improved the quality of phosphatize phosphate coat, has improved phosphatization speed.The good concentration of add-on is 1.5 ~ 2.0g/L.
(7) Sodium Fluoride.During low temperature phosphor, the dissolving of rusty scale is slow, whole parkerizing process is obstructed, F
-effect, first promotes the dissolving of rusty scale, metal material surface is rendered as be conducive to the active zone of phosphate crystal nucleation, accelerates parkerizing process.Second reduces Al
3+negative catalysis, hot-galvanized steel is added with aluminium in galvanizing flux, purpose is to make the zinc-plated surperficial glossiness of easily carrying out and increase.Therefore, can there be aluminum oxide segregation layer in its surface, and Al
3+be to endanger larger negative contact agent, when the content when it in Phosphating Solution surpasses 0.5g/L, phosphatize phosphate coat grows dim, inhomogeneous, or stops film forming fully.In Phosphating Solution, add Sodium Fluoride can make the Al be dissolved out
3+generate insoluble Na
3alF
6, eliminate Al
3+impact.General control is advisable at 1.5～2.0g/L.
（8）OP-10。Non-ionic surfactant OP-10 has good perviousness, wettability and oil removing ability; Soluble in water, acidproof, not with Action of Metal Ions, stable in the aqueous solution; Can be penetrated into rusty scale inside, be conducive to form the rusty scale conversion film of parcel full performance.Add OP-10 obviously to improve phosphorization film quality, but its content is little to the Phosphating Solution performance impact, adds appropriate OP-10 and get final product in Phosphating Solution.
(9) ethanol.Its volatilization has to phosphate layer the dry effect of urging.
Formula:
Phosphoric acid (85%) 180 ml,
Ethanol (85%) 60ml,
OP-10(industry) 3.0 ml,
Zinc oxide 5.0 g,
CUT-052 1.5g，
Nickelous nitrate 2.5 g,
NCE-C01 10.0ml，
Sodium chlorate 1.5g,
NaF 1.5g，
Water surplus.
Preparation:
(1) 60ml ethanol (85%) is added in the 1L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 1L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Embodiment 5 is for the preparation of steel tower rot-resistant Phosphating Solution 1L
Formula:
Phosphoric acid (85%) 185 ml,
Ethanol (85%) 65 ml,
OP-10(industry) 3.5 ml,
Zinc oxide 6.5 g,
CUT-052 2.0g，
Nickelous nitrate 3.5 g,
NCE-C01 14.0 ml，
Sodium chlorate 2.0g,
NaF 2.0g，
Water surplus.
Preparation:
(1) ethanol is added in the 1L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 1L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Embodiment 6 is for the preparation of steel tower rot-resistant Phosphating Solution 1L
Formula:
Phosphoric acid (85%
, V/
v) 182 ml,
Ethanol (85%
, V/
v) 63ml,
OP-10(industry) 3.2ml,
Zinc oxide 5.8 g,
CUT-052 1.7g，
Nickelous nitrate 3g,
NCE-C01 12.0 ml，
Sodium chlorate 1.8g,
NaF 1.7g，
Water surplus.
Preparation:
(1) ethanol is added in the 1L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 1L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Embodiment 7 is for the preparation of steel tower rot-resistant Phosphating Solution 100L
Formula:
Phosphoric acid (85%) 18L,
Ethanol (85%) 6L,
OP-10(industry) 0.3L,
Zinc oxide 500g,
CUT-052 150g，
Nickelous nitrate 250g,
NCE-C01 1L，
Sodium chlorate 150g,
NaF 150g，
Water surplus.
Preparation:
(1) ethanol is added in the 100L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 100L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Formula:
Phosphoric acid (85%) 18.5L,
Ethanol (85%) 6.5L,
OP-10(industry) 0.35 L,
Zinc oxide 650g,
CUT-052 200g，
Nickelous nitrate 350g,
NCE-C01 1.4L，
Sodium chlorate 200g,
NaF 200g，
Water surplus.
Preparation:
(1) ethanol is added in the 100L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 100L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Embodiment 9 is for the preparation of steel tower rot-resistant Phosphating Solution 100L
Formula
Phosphoric acid (85%): 18.2 L,
Ethanol (85%) 6.3L,
OP－10 0.32L，
Zinc oxide 580 g,
CUT-052 170g，
Nickelous nitrate 300g,
NCE-C01 1.2L，
Sodium chlorate 180g,
NaF 170g，
Water surplus.
Preparation:
(1) ethanol is added in the 100L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2) zinc oxide is added to water furnishing pasty state and slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3) under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 100L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
Embodiment 10 phosphatize phosphate coat service checks
According to the national standard relevant regulations, the performance of embodiment 1 gained phosphate layer is tested, the results are shown in Table 2.
The performance test results of table 2 phosphatize phosphate coat
The selection of embodiment 11 anticorrosive coatings
Selection for anticorrosive coating; except will considering its excellent property, low price, wide material sources; the matching performance of the phosphate coating that main consideration and metallic surface generate; therefore do phosphate coating and supporting salt mist experiment, 3.5% sodium-chlor immersion test and the anodic polarization curves of paint film, according to experimental result, determined suitable coating.In Table 3.
Table 3 and the supporting protective system of phosphatize phosphate coat
Experiment shows that the matching performance of phosphate coating and organic coating is good, in order further to confirm the difference between its supporting corrosion resisting property and 3 kinds of auxiliary plan etch resistant properties, has carried out having stronger destructive constant potential anodic polarization to test.This experiment is the testing method of a kind of destructiveness, non-reproduction.The sample that painting installs, as anode, is placed in 3%NaCl solution, measures electric current relation over time, estimates the corrosion resisting property of paint film with the size of corrosion current.Experimental result is shown in Fig. 1.Result shows, 3 kinds of auxiliary plans all have good etch resistant properties.Sample is without rust cleaning, direct brushing Phosphating Solution, and after naturally drying, paint brush.
Experimental result shows, phosphatize phosphate coat is as corrosion steel tower application bottom, and good with the matching performance of organic coating, etch resistant properties is good.
Claims (3)
1. one kind for steel tower rot-resistant Phosphating Solution, it is characterized in that, described Phosphating Solution 1L adopts the raw material of following proportioning to make:
Concentration expressed in percentage by volume is 85%
'sphosphatase 11 80 ~ 185 ml,
Concentration expressed in percentage by volume is 85%
'sethanol 60 ~ 65 ml,
OP－10 3.0~3.5 ml，
Zinc oxide 5.0 ~ 6.5 g,
CUT-052 1.5~2.0g，
Nickelous nitrate 2.5 ~ 3.5 g,
NCE-C01 10.0~14.0 ml，
Sodium chlorate 1.5 ~ 2.0g,
NaF 1.5~2.0g，
Water surplus.
2. according to claim 1ly for steel tower rot-resistant Phosphating Solution, it is characterized in that, at ambient temperature, pH is 0.43 to described Phosphating Solution, and free acidity FA is 230 points, and total acidity TA is 480 points.
3. one kind prepares the method for steel tower rot-resistant Phosphating Solution as claimed in claim 1 or 2, it is characterized in that, prepared as follows by its 1L Phosphating Solution:
(1), ethanol is added in the 1L container, add at leisure while stirring CUT-052, it is dissolved fully, place standby;
(2), zinc oxide added to water furnishing pasty state slowly add in phosphoric acid solution, generate zinc phosphate, after dissolving fully, under constantly stirring, slowly add nickelous nitrate, NCE-C01 solution, Sodium Fluoride, sodium chlorate, OP-10, standby;
(3), under constantly stirring, the solution that (1) step is obtained slowly injects the solution of (2) step, then is diluted with water to 1L, obtains above-mentioned for steel tower rot-resistant Phosphating Solution.
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| CN2013100663541A CN103088324A (en) | 2013-03-01 | 2013-03-01 | Phosphating solution for corrosion prevention of iron towers and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794523A (en) * | 2016-09-06 | 2018-03-13 | 鞍钢股份有限公司 | A kind of weather-resistant steel plate Accelerated corrosion method |
| CN108690977A (en) * | 2017-04-12 | 2018-10-23 | 国网山东省电力公司电力科学研究院 | A kind of electric power pylon Corrosion Maintenance method |
| CN110344639A (en) * | 2019-07-11 | 2019-10-18 | 湖北联网电力设计有限公司 | A kind of power transmission line tower bar guard member |
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| WO2002024973A2 (en) * | 2000-09-20 | 2002-03-28 | Ge Betz, Inc. | Tri-cation zinc phosphate conversion coating and process of making the same |
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| WO2002024973A2 (en) * | 2000-09-20 | 2002-03-28 | Ge Betz, Inc. | Tri-cation zinc phosphate conversion coating and process of making the same |
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| 陈颖敏等: "锈蚀输电杆塔涂装前处理磷化液配方", 《腐蚀与防护》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794523A (en) * | 2016-09-06 | 2018-03-13 | 鞍钢股份有限公司 | A kind of weather-resistant steel plate Accelerated corrosion method |
| CN108690977A (en) * | 2017-04-12 | 2018-10-23 | 国网山东省电力公司电力科学研究院 | A kind of electric power pylon Corrosion Maintenance method |
| CN110344639A (en) * | 2019-07-11 | 2019-10-18 | 湖北联网电力设计有限公司 | A kind of power transmission line tower bar guard member |
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