WO2014206277A1 - Weather resistant metal support structure - Google Patents
Weather resistant metal support structure Download PDFInfo
- Publication number
- WO2014206277A1 WO2014206277A1 PCT/CN2014/080631 CN2014080631W WO2014206277A1 WO 2014206277 A1 WO2014206277 A1 WO 2014206277A1 CN 2014080631 W CN2014080631 W CN 2014080631W WO 2014206277 A1 WO2014206277 A1 WO 2014206277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- support structure
- weather
- metal support
- resistant metal
- magnesium
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 239000011253 protective coating Substances 0.000 claims abstract description 17
- 239000007769 metal material Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 229910052749 magnesium Inorganic materials 0.000 claims description 14
- 239000011777 magnesium Substances 0.000 claims description 14
- -1 magnesium aluminum silicon Chemical compound 0.000 claims description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910000676 Si alloy Inorganic materials 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 229910001335 Galvanized steel Inorganic materials 0.000 description 7
- 239000008397 galvanized steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009956 embroidering Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the invention relates to the technical field of weather-resistant metal support structures, in particular to a bracket system having dimensional accuracy requirements or appearance requirements, such as a solar device bracket. Background technique
- a solar photovoltaic panel assembly In a solar energy utilization system, a solar photovoltaic panel assembly is usually installed in a solar energy bracket, and the solar photovoltaic panel assembly absorbs solar energy for use, or the solar energy bracket is used to support a collecting mirror, and the solar light is reflected by the mirror to the collector member. On, convert sunlight into heat for use.
- the solar brackets In order to achieve high efficiency and low cost utilization of solar energy, it is generally required to scale solar components, thus requiring a large receiving area and numerous solar racks to support photovoltaic cells or concentrating mirrors.
- the solar brackets are arranged outdoors, and the external corrosion is more severe. It needs to be surface treated on the surface of the bracket to improve its weather resistance.
- the traditional treatment process is aluminum plating, galvanizing or anti-rust paint, but the protection effect is not ideal, and Surface collisions are inevitable during the process of mechanical operation or maintenance, resulting in damage to the outer surface protective layer; more importantly, the solar mounting system has high requirements for dimensional accuracy, after conventional steel processing (regardless of hot and cold Processing), it is usually necessary to carry out hot-dip galvanizing treatment to meet the perennial open-air environment. It is not only efficient and cost-effective, but also causes environmental pollution. More importantly, it causes obvious deformation of the structure. Accuracy or appearance cannot be guaranteed. Correction; Or the conventional steel is sprayed or electroplated with zinc; the former has poor protection effect, and the latter has large environmental pollution during the process; all kinds of factors have virtually increased the processing cost of the weather-resistant metal support structure.
- the invention provides a weather-resistant metal support structure, has better corrosion protection capability and can be effective Maintain the processing accuracy of the structure and the flatness of the appearance.
- the present invention provides a weather resistant metal support structure having a self-healing protective coating on the outer surface of the metal material forming the weather resistant metal support structure.
- the self-healing protective coating contains zinc, aluminum and magnesium elements.
- the self-healing protective coating contains zinc 82-85 wt%, aluminum 10-12 wt%, and magnesium.
- the self-healing protective coating further contains silicon.
- the self-healing protective coating is a composite coating formed by recoating a magnesium or magnesium alloy coating on a steel having a galvanized or galvanized aluminum coating.
- the magnesium alloy coating is a magnesium aluminum, magnesium silicon or magnesium aluminum silicon alloy coating.
- the composite coating formed by the second coating of the magnesium or magnesium alloy coating is subjected to heat treatment.
- the weather resistant metal support structure is applied to a solar concentrating photothermal system support having a dimensional accuracy requirement, a solar concentrating photovoltaic system support or a distributed photovoltaic or photothermal support.
- the weather resistant metal support structure is applied to metal parts of outdoor facilities having appearance requirements. Further, the metal parts of the facility are signs or guardrails.
- the surface of the weather-resistant metal support structure is coated with a zinc-aluminum-magnesium coating, and its protective performance is 10-20 times that of ordinary galvanized steel sheets, and the service life is much longer than that of galvanized steel sheets and galvanized steel sheets, and zinc aluminum magnesium
- the coating has a slit protection function, that is, self-healing function (the end of the steel plate coated with zinc aluminum magnesium silicon coating, the cut section and the damage of the coating layer, which can be covered by the corrosion product containing Zn and Mg,
- self-healing function the end of the steel plate coated with zinc aluminum magnesium silicon coating, the cut section and the damage of the coating layer, which can be covered by the corrosion product containing Zn and Mg.
- the damage caused by the traditional shear rivet various processes on the coating surface of the processing surface can cover the healing within a certain period of time, and does not cause severe corrosion of a large area continuously, maintaining the mechanical strength of the supporting structure.
- this self-healing coating can effectively prevent the red rust generated by various corrosion points on the metal material from continuing to grow and expand, preventing the rust from contaminating the nearby installation area, maintaining the appearance, and being suitable for daily visible municipal structures, distributed photovoltaics, and light. Installation of heat and other devices. detailed description The bracket of the solar concentrating light and heat system requires high dimensional accuracy and the outdoor service life needs to be reached.
- the outer surface of the bracket metal needs good corrosion protection. Under normal circumstances, hot-dip galvanizing after machining, the cost is high, the environmental pollution is serious, and the dimensional accuracy cannot be guaranteed.
- the invention adopts the plate of galvanized aluminum magnesium silicon (that is, the self-healing protective coating), and even if the processing includes various processes such as shearing, punching, splicing, etc., there are many damage points on the coated surface, and subsequent Surface thermal coating is applied to maintain the processing accuracy, but each test shows that the product can still effectively guarantee the service life.
- the self-healing protective coating is made of a weather-resistant metal support structure and is used as a support for the solar concentrating photothermal system. It has good weather resistance and can meet the outdoor life requirements of the solar concentrating system bracket.
- the outer surface of the metal material of the weather resistant metal support structure has a self-healing protective coating, and the self-healing protective coating is a zinc aluminum magnesium coating, and the composition is zinc, aluminum, magnesium and a small amount of other additive elements, preferably, The additive element is mainly silicon, and the composite effect of the magnesium-silicon element can further improve the corrosion inhibition efficiency.
- the self-healing protective coating is a composite coating formed by coating a coating of a magnesium or magnesium alloy on a coated steel such as a conventional type of galvanized or galvanized aluminum.
- the magnesium alloy coating is magnesium aluminum or magnesium silicon or magnesium aluminum silicon alloy.
- the secondary coating of the composite coating is followed by heat treatment to improve the coating protection effect.
- the weather-resistant metal support structure can also be applied to a solar concentrating photovoltaic support, a distributed photovoltaic support, a municipal structure, and the like, and the weather-resistant metal support structure can also be applied to an outdoor facility metal part having an appearance requirement, such as a signage. Or the guardrail, etc., can achieve the same effect.
- the self-healing protective coating is zinc-aluminum-magnesium coating with composition of zinc 82-85wt%, aluminum 10-12 wt%, magnesium 3-5 wt% and other added elements such as silicon.
- the sample base material and the repaired part coated with the zinc aluminum magnesium silicon coating hardly produced red rust within 1500 hours, and the red embossed area ratio of the conventional galvanized base material reached 3%.
- the red rust occurrence area of the repaired parts of the conventional galvanized base metal has reached 23%.
- the sample base material and repair parts coated with zinc aluminum magnesium silicon coating produced almost no red rust in 150 cycles, while the red embroidering area ratio of the traditional galvanized base material reached 100%; At the same time, it can ensure the corrosion resistance of the deep-drawn part, and it can guarantee no rust after 60 cycles.
- the amount of coating dissolved in 5% NaCl solution for 24 hours is less than 20g/m 2 , while the dissolution of other materials (normal galvanized steel and ordinary steel, and hot-dip galvanized steel) It is higher than 20g/m 2 ; its alkali resistance is especially excellent. Under the conditions of strong alkali, the amount of dissolution is kept at 20g/m 2 during the immersion time of the same solution for 350 hours, and no further development, other materials (galvanized steel sheet) And hot-dip galvanized steel) dissolved in the same amount of time up to 140g / m 2 .
- the end portion and the cross section of the steel plate coated with the zinc aluminum magnesium silicon coating are covered by the corrosion product containing Zn and Mg to form a stable protective film, and there is no corrosion phenomenon for a long period of time, and self-healing Protection function.
- the tensile shear test when the thickness of the steel plate is 0.4 mm, the tensile shear strength of the point ⁇ part can satisfy the target value of 1.3 kN, and when the thickness of the steel plate is 3.2 mm, the tensile resistance of the point ⁇ part The shear strength can meet the target value of 30kN. When the thickness of the steel plate is 9.0mm, the tensile shear strength of the point is sufficient to meet the target value of 100kN. At the same time, the macroscopic section observation shows that the diameter of the defect point is 3.7mm, which satisfies the target defect diameter of 3.2mm.
Abstract
A weather resistant metal support structure. The outer surface of the metal material of the structure has a self-healing protective coating. The structure can be applied to multiple support systems in outdoor weather resistant operation, is easy to manufacture, has a low cost, self-healing functions, good outdoor protective performance, a long service life, and can be applied on a large scale.
Description
一种耐候金属支撑结构 技术领域 Weather-resistant metal support structure
本发明涉及一种耐候金属支撑结构技术领域， 尤其涉及有尺寸精度要求 或外观要求的支架体系， 如太阳能装置支架。 背景技术 The invention relates to the technical field of weather-resistant metal support structures, in particular to a bracket system having dimensional accuracy requirements or appearance requirements, such as a solar device bracket. Background technique
太阳能利用系统中， 通常在太阳能支架内安装有太阳能光伏板组件， 通 过太阳能光伏板组件吸收太阳能进行利用， 或者将太阳能支架用于支撑聚光 反射镜， 通过反射镜反射太阳光于集热器构件上， 将太阳光转化成热能进行 禾 U用。 为实现高效率、 低成本的利用太阳能， 通常需要将太阳能构件规模化， 因此需要巨大的接收面积和众多的太阳能支架用以支撑光伏电池组件或聚光 反射镜。 太阳能支架都布置于户外， 外部腐蚀比较厉害， 需要在支架表面进 行表面处理， 提高其耐候性能， 传统处理工艺为镀铝、 镀锌或喷防锈漆等， 但防护效果并不理想， 且在机械运转的过程或维修期间不可避免的出现表面 磕碰现象， 造成外表面防护层的破坏； 更为重要的是， 太阳能支架系统对尺 寸精度具有较高的要求， 常规的钢材加工后 （无论冷热加工） ， 目前通常需 要进行热浸锌处理才可满足常年露天使用环境， 不但效率低成本高， 还会造 成环境污染， 更重要的是造成结构明显变形， 精度或外观无法保证， 必须进 行二次修正； 或者对常规的钢材进行喷涂或者电镀锌等工艺处理； 前者防护 效果不佳， 后者工艺处理过程中对环境污染较大； 种种因素都无形中增加了 耐候金属支撑结构的加工成本。 In a solar energy utilization system, a solar photovoltaic panel assembly is usually installed in a solar energy bracket, and the solar photovoltaic panel assembly absorbs solar energy for use, or the solar energy bracket is used to support a collecting mirror, and the solar light is reflected by the mirror to the collector member. On, convert sunlight into heat for use. In order to achieve high efficiency and low cost utilization of solar energy, it is generally required to scale solar components, thus requiring a large receiving area and numerous solar racks to support photovoltaic cells or concentrating mirrors. The solar brackets are arranged outdoors, and the external corrosion is more severe. It needs to be surface treated on the surface of the bracket to improve its weather resistance. The traditional treatment process is aluminum plating, galvanizing or anti-rust paint, but the protection effect is not ideal, and Surface collisions are inevitable during the process of mechanical operation or maintenance, resulting in damage to the outer surface protective layer; more importantly, the solar mounting system has high requirements for dimensional accuracy, after conventional steel processing (regardless of hot and cold Processing), it is usually necessary to carry out hot-dip galvanizing treatment to meet the perennial open-air environment. It is not only efficient and cost-effective, but also causes environmental pollution. More importantly, it causes obvious deformation of the structure. Accuracy or appearance cannot be guaranteed. Correction; Or the conventional steel is sprayed or electroplated with zinc; the former has poor protection effect, and the latter has large environmental pollution during the process; all kinds of factors have virtually increased the processing cost of the weather-resistant metal support structure.
再者， 户外常见一些对外观要求较高的支撑结构， 对其进行常规的金属 构件防护处理同样出现上述问题。 分布式光伏、 光热装置， 一般靠近生活生 产区域安装， 其一般使用的碳钢金属支架发生腐蚀后， 会产生红锈斑并持续 发展， 污染到附近安装区域， 影响环境美观。 发明内容 Furthermore, there are some support structures that are more demanding on the exterior, and the above-mentioned problems are also caused by the conventional metal member protection treatment. Distributed photovoltaic and photothermal devices are generally installed close to the living and production areas. After the carbon steel metal brackets used in general use are corroded, red rust will occur and continue to develop, polluting the nearby installation area and affecting the environment. Summary of the invention
本发明提供一种耐候金属支撑结构， 具有较好的腐蚀防护能力， 能有效
保持结构的加工精度以及外观平整度。 The invention provides a weather-resistant metal support structure, has better corrosion protection capability and can be effective Maintain the processing accuracy of the structure and the flatness of the appearance.
本发明提供一种耐候金属支撑结构， 形成所述耐候金属支撑结构的金属 材料外表面具有自愈合防护涂层。 The present invention provides a weather resistant metal support structure having a self-healing protective coating on the outer surface of the metal material forming the weather resistant metal support structure.
进一歩地， 所述自愈合防护涂层中包含锌、 铝和镁元素。 Further, the self-healing protective coating contains zinc, aluminum and magnesium elements.
进一歩地， 所述自愈合防护涂层中包含锌 82-85 wt %、 铝 10-12 wt %和镁 Further, the self-healing protective coating contains zinc 82-85 wt%, aluminum 10-12 wt%, and magnesium.
3-5 wt %。 3-5 wt %.
进一歩地， 所述自愈合防护涂层中还包含硅元素。 Further, the self-healing protective coating further contains silicon.
进一歩地， 所述自愈合防护涂层为在具有镀锌或镀锌铝涂层的钢材上再 二次涂镀镁或镁合金涂层所形成的复合涂层。 Further, the self-healing protective coating is a composite coating formed by recoating a magnesium or magnesium alloy coating on a steel having a galvanized or galvanized aluminum coating.
进一歩地， 所述镁合金涂层为镁铝、 镁硅或镁铝硅合金涂层。 Further, the magnesium alloy coating is a magnesium aluminum, magnesium silicon or magnesium aluminum silicon alloy coating.
进一歩地， 二次涂镀镁或镁合金涂层所形成的复合涂层后再进行热处理。 进一歩地， 所述耐候金属支撑结构应用于有尺寸精度要求的太阳能聚光 光热系统支架、 太阳能聚光光伏系统支架或分布式光伏或光热支架。 Further, the composite coating formed by the second coating of the magnesium or magnesium alloy coating is subjected to heat treatment. Further, the weather resistant metal support structure is applied to a solar concentrating photothermal system support having a dimensional accuracy requirement, a solar concentrating photovoltaic system support or a distributed photovoltaic or photothermal support.
进一歩地， 所述耐候金属支撑结构应用于有外观要求的户外设施金属件。 进一歩地， 所述设施金属件为标牌或护栏。 该耐候金属支撑结构的表面 涂有锌铝镁涂层， 其防护性能是普通镀锌钢板的 10~20倍， 使用寿命更是比镀 锌钢板和镀铝锌板长得多，且锌铝镁涂层具有切口保护功能，即自愈合功能 (镀 有锌铝镁硅涂层的钢板端部、 切口断面及涂层破坏处， 由于能够被含有 Zn、 Mg的腐蚀生成物所逐歩覆盖， 形成新的稳定的保护膜， 在长时间段内并无腐 蚀现象继续发生， 具有自愈合防护功能)， 不需后续高温度的表面处理工序也 有很好的腐蚀防护能力， 能有效保持结构的加工精度或外观平整度， 特别适 合有精度或外观要求的金属结构， 如太阳能聚光光热系统支架， 聚光光伏支 架， 分布式光伏系统支架， 市政设施金属件 （标牌， 护栏等等） 。 采用上述 涂层材料， 传统的剪切悍铆各种工艺对其加工面的涂层所造成的破坏能够在 一定时间内覆盖愈合， 不会产生持续大面积的严重腐蚀， 保持支撑结构的机 械强度。 另外， 此类自愈合涂层， 能有效避免金属材料上各腐蚀点产生的红 锈持续生长扩大， 防止锈迹污染附近安装区域， 保持美观， 适合日常可见的 市政结构、 分布式光伏、 光热等装置的安装使用。 具体实施方式
太阳能聚光光热系统的支架， 要求尺寸精度高， 户外使用寿命需要达到Further, the weather resistant metal support structure is applied to metal parts of outdoor facilities having appearance requirements. Further, the metal parts of the facility are signs or guardrails. The surface of the weather-resistant metal support structure is coated with a zinc-aluminum-magnesium coating, and its protective performance is 10-20 times that of ordinary galvanized steel sheets, and the service life is much longer than that of galvanized steel sheets and galvanized steel sheets, and zinc aluminum magnesium The coating has a slit protection function, that is, self-healing function (the end of the steel plate coated with zinc aluminum magnesium silicon coating, the cut section and the damage of the coating layer, which can be covered by the corrosion product containing Zn and Mg, The formation of a new stable protective film, no corrosion continues to occur in a long period of time, with self-healing protection function), does not require a subsequent high temperature surface treatment process and also has good corrosion protection ability, can effectively maintain the structure Processing accuracy or appearance flatness, especially suitable for metal structures with precision or appearance requirements, such as solar concentrating photothermal system brackets, concentrating photovoltaic brackets, distributed photovoltaic system brackets, municipal facilities metal parts (signage, guardrails, etc.). By adopting the above coating material, the damage caused by the traditional shear rivet various processes on the coating surface of the processing surface can cover the healing within a certain period of time, and does not cause severe corrosion of a large area continuously, maintaining the mechanical strength of the supporting structure. . In addition, this self-healing coating can effectively prevent the red rust generated by various corrosion points on the metal material from continuing to grow and expand, preventing the rust from contaminating the nearby installation area, maintaining the appearance, and being suitable for daily visible municipal structures, distributed photovoltaics, and light. Installation of heat and other devices. detailed description The bracket of the solar concentrating light and heat system requires high dimensional accuracy and the outdoor service life needs to be reached.
25年， 因此支架金属外表面需要很好的腐蚀防护， 一般情况下， 机械加工后 再热浸锌， 成本高， 环境污染严重， 尺寸精度无法保证。 For 25 years, the outer surface of the bracket metal needs good corrosion protection. Under normal circumstances, hot-dip galvanizing after machining, the cost is high, the environmental pollution is serious, and the dimensional accuracy cannot be guaranteed.
本发明采用镀锌铝镁硅 （即所述自愈合防护涂层） 的板材， 即使加工过 程包括剪切、 打孔、 悍接等多种工序， 对涂镀表面有很多破坏点， 后续不再 进行表面热涂镀处理以保持加工精度， 但各项测试显示产品仍能有效保证使 用寿命。 且具有自愈合防护涂层的板材制成耐候金属支撑结构后作为太阳能 聚光光热系统的支架， 具有很好的耐候性能， 可以满足太阳能聚光系统支架 户外寿命使用要求。 所述耐候金属支撑结构的金属材料外表面具有自愈合防 护涂层， 所述自愈合防护涂层为锌铝镁涂层， 成分为锌、 铝、 镁及少量其它 添加元素， 优选地， 所述添加元素主要为硅， 镁硅元素的复合效果可进一歩 提高腐蚀抑制效率。 所述自愈合防护涂层为在常规种类的镀锌或镀锌铝等涂 层钢材上再二次涂镀镁或镁合金涂层所形成的复合涂层。 所述的镁合金涂层 为镁铝或镁硅或镁铝硅合金。 所述的二次涂镀复合涂层后再进行热处理， 以 改善涂层防护效果。 所述耐候金属支撑结构也可应用于太阳能聚光光伏支架、 分布式光伏支架、 市政结构等支架体系， 同时还可将所述耐候金属支撑结构 应用于有外观要求的户外设施金属件， 例如标牌或护栏等， 也可达到相同效 果。 The invention adopts the plate of galvanized aluminum magnesium silicon (that is, the self-healing protective coating), and even if the processing includes various processes such as shearing, punching, splicing, etc., there are many damage points on the coated surface, and subsequent Surface thermal coating is applied to maintain the processing accuracy, but each test shows that the product can still effectively guarantee the service life. The self-healing protective coating is made of a weather-resistant metal support structure and is used as a support for the solar concentrating photothermal system. It has good weather resistance and can meet the outdoor life requirements of the solar concentrating system bracket. The outer surface of the metal material of the weather resistant metal support structure has a self-healing protective coating, and the self-healing protective coating is a zinc aluminum magnesium coating, and the composition is zinc, aluminum, magnesium and a small amount of other additive elements, preferably, The additive element is mainly silicon, and the composite effect of the magnesium-silicon element can further improve the corrosion inhibition efficiency. The self-healing protective coating is a composite coating formed by coating a coating of a magnesium or magnesium alloy on a coated steel such as a conventional type of galvanized or galvanized aluminum. The magnesium alloy coating is magnesium aluminum or magnesium silicon or magnesium aluminum silicon alloy. The secondary coating of the composite coating is followed by heat treatment to improve the coating protection effect. The weather-resistant metal support structure can also be applied to a solar concentrating photovoltaic support, a distributed photovoltaic support, a municipal structure, and the like, and the weather-resistant metal support structure can also be applied to an outdoor facility metal part having an appearance requirement, such as a signage. Or the guardrail, etc., can achieve the same effect.
经过实测结果表明， 采用的具有自愈合功能的防护涂层为锌铝镁涂层， 成分为锌 82-85wt%、 铝 10-12 wt %、 镁 3-5 wt %及其它添加元素如硅时， 盐水 喷雾实验中， 镀有该锌铝镁硅涂层的样件母材及修补部位在 1500小时内几乎 不产生红锈， 传统镀锌母材的红绣发生面积率已达 3%， 传统镀锌母材的修补 部位的红锈发生面积率已经达到 23%。中性盐水周期实验中，镀有锌铝镁硅涂 层的样件母材及修补部位在 150周期内几乎不产生红锈， 而传统镀锌母材的红 绣发生面积率已达 100%; 同时能够保证深冲部位的防腐蚀性能， 能够保证在 60周期后不生锈。 The measured results show that the self-healing protective coating is zinc-aluminum-magnesium coating with composition of zinc 82-85wt%, aluminum 10-12 wt%, magnesium 3-5 wt% and other added elements such as silicon. At the time of the salt spray test, the sample base material and the repaired part coated with the zinc aluminum magnesium silicon coating hardly produced red rust within 1500 hours, and the red embossed area ratio of the conventional galvanized base material reached 3%. The red rust occurrence area of the repaired parts of the conventional galvanized base metal has reached 23%. In the neutral salt water cycle experiment, the sample base material and repair parts coated with zinc aluminum magnesium silicon coating produced almost no red rust in 150 cycles, while the red embroidering area ratio of the traditional galvanized base material reached 100%; At the same time, it can ensure the corrosion resistance of the deep-drawn part, and it can guarantee no rust after 60 cycles.
其耐酸碱性能比较优异， 在 5%Nacl溶液 24小时浸渍时的镀层溶解量低于 20g/m2, 而其他材料（普通镀锌钢板以及普通钢板， 以及热镀锌钢板）的溶解 量皆高于 20g/m2 ; 其耐碱性能尤其优异， 强碱条件下， 在 350小时的同样溶液 的浸渍时间内， 溶解量保持在 20g/m2， 没有继续发展， 而其他材料（镀锌钢板 以及热镀锌钢板） 在相同的时间内溶解量高达 140g/m2。
并且， 镀有锌铝镁硅涂层的钢板端部及断面由于被含有 Zn、 Mg的腐蚀生 成物所覆盖， 形成稳定的保护膜， 在长时间段内并无腐蚀现象发生， 具有自 愈合防护功能。 Its acid and alkali resistance is excellent. The amount of coating dissolved in 5% NaCl solution for 24 hours is less than 20g/m 2 , while the dissolution of other materials (normal galvanized steel and ordinary steel, and hot-dip galvanized steel) It is higher than 20g/m 2 ; its alkali resistance is especially excellent. Under the conditions of strong alkali, the amount of dissolution is kept at 20g/m 2 during the immersion time of the same solution for 350 hours, and no further development, other materials (galvanized steel sheet) And hot-dip galvanized steel) dissolved in the same amount of time up to 140g / m 2 . Moreover, the end portion and the cross section of the steel plate coated with the zinc aluminum magnesium silicon coating are covered by the corrosion product containing Zn and Mg to form a stable protective film, and there is no corrosion phenomenon for a long period of time, and self-healing Protection function.
在复合腐蚀试验性能中， 与不锈钢钢板相比， 由于镀有锌铝镁硅涂层， 90周期后只会出现白锈， 而不锈钢钢板不仅在 30周期时出现红锈， 且还有不 断发展的趋势。 In the composite corrosion test performance, compared with the stainless steel plate, due to the zinc-aluminum-magnesium-silicon coating, only white rust will appear after 90 cycles, and the stainless steel plate not only has red rust at 30 cycles, but also has an ever-developing trend.
除了具有良好的防腐蚀性能， 同时具有优越的悍接性能。 以点悍为例， 在拉伸抗剪试验中， 钢板厚度 0.4mm时， 点悍部位的拉伸抗剪强度可以满足 1.3kN的目标值， 钢板厚度 3.2mm时， 点悍部位的拉伸抗剪强度可以满足 30kN 的目标值， 钢板厚度 9.0mm时， 点悍部位的拉伸抗剪强度可以满足 100kN的目 标值。 同时对宏观断面观察表明， 此时的悍点直径为 3.7mm， 满足了目标悍点 直径 3.2mm。这两点可以确认其具有良好的悍缝性能。 同时， 涂镀钢板进行点 悍时， 悍接部位的钢板呈熔融状态， 但低熔点的镀层在此以前就被挤出到悍 接部周边。 因此， 镀层基本上从悍接部被排除， 悍接性能不会受到影响。 有 时悍接金属中有气孔等残留下来， 但被确认在合适的条件下进行悍接时， 悍 接接缝强度不会劣化。 In addition to good corrosion resistance, it also has superior splicing performance. Taking the point 悍 as an example, in the tensile shear test, when the thickness of the steel plate is 0.4 mm, the tensile shear strength of the point 悍 part can satisfy the target value of 1.3 kN, and when the thickness of the steel plate is 3.2 mm, the tensile resistance of the point 悍 part The shear strength can meet the target value of 30kN. When the thickness of the steel plate is 9.0mm, the tensile shear strength of the point is sufficient to meet the target value of 100kN. At the same time, the macroscopic section observation shows that the diameter of the defect point is 3.7mm, which satisfies the target defect diameter of 3.2mm. These two points can be confirmed to have good quilting properties. At the same time, when the coated steel sheet is subjected to spotting, the steel sheet in the splicing portion is in a molten state, but the low melting point plating layer is previously extruded to the periphery of the nip portion. Therefore, the plating layer is substantially excluded from the splicing portion, and the splicing performance is not affected. Sometimes, there are pores in the splicing metal, etc., but it is confirmed that the splicing joint strength does not deteriorate when the splicing is performed under suitable conditions.
另外， 目前市场上常规的镀锌或镀锌铝合金层钢板数量巨大， 产能过剩， 价格低廉， 可通过在此类钢板上再增加涂镀镁或镁合金涂层的二次复合涂层 方式， 获得具有自愈合防护功能的复合涂层， 可以降低成本， 充分利用过剩 产能。 在此类加工方式中， 对复合涂层进行热处理， 将进一歩增强复合涂层 的防护能力。 In addition, the number of conventional galvanized or galvanized aluminum alloy steel sheets on the market is huge, overcapacity, and low in price, and it is possible to increase the secondary composite coating method of coating magnesium or magnesium alloy coating on such steel sheets. A composite coating with self-healing protection can reduce costs and make full use of excess capacity. In this type of processing, heat treatment of the composite coating will further enhance the protective ability of the composite coating.
显而易见， 在不偏离本发明的真实精神和范围的前提下， 在此描述的本 发明可以有许多变化。 因此， 所有对于本领域技术人员来说可以预见的改变， 都应包括在本权利要求书所涵盖的范围之内。 本发明所要求保护的范围由所 述的权利要求书进行限定。
It will be apparent that the invention described herein can be varied in many ways without departing from the true spirit and scope of the invention. Therefore, all changes that can be foreseen by those skilled in the art are intended to be included within the scope of the claims. The scope of the invention as defined by the appended claims is defined by the claims.
Claims
1、 一种耐候金属支撑结构， 其特征在于， 构成所述耐候金属支撑结构的 金属材料外表面具有自愈合防护涂层。 1. A weather-resistant metal support structure, characterized in that the outer surface of the metal material constituting the weather-resistant metal support structure has a self-healing protective coating.
2、 根据权利要求 1所述的耐候金属支撑结构， 其特征在于， 所述自愈合 防护涂层中包含锌、 铝和镁元素。 2. The weather-resistant metal support structure according to claim 1, characterized in that the self-healing protective coating contains zinc, aluminum and magnesium elements.
3、 根据权利要求 2所述的耐候金属支撑结构， 其特征在于， 所述自愈合 防护涂层中包含锌 82-85 wt %、 铝 10-12 wt %和镁 3-5 wt %。 3. The weather-resistant metal support structure according to claim 2, characterized in that the self-healing protective coating contains 82-85 wt% zinc, 10-12 wt% aluminum and 3-5 wt% magnesium.
4、 根据权利要求 2或 3所述的耐候金属支撑结构， 其特征在于， 所述自愈 合防护涂层中还包含硅元素。 4. The weather-resistant metal support structure according to claim 2 or 3, characterized in that the self-healing protective coating also contains silicon element.
5、 根据权利要求 1所述的耐候金属支撑结构， 其特征在于， 所述自愈合 防护涂层为在具有镀锌或镀锌铝涂层的钢材上再二次涂镀镁或镁合金涂层所 形成的复合涂层。 5. The weather-resistant metal support structure according to claim 1, characterized in that the self-healing protective coating is a second coat of magnesium or magnesium alloy coating on steel with galvanized or galvanized aluminum coating. Composite coating formed by layers.
6、 根据权利要求 5所述的耐候金属支撑结构， 其特征在于， 所述镁合金 涂层为镁铝、 镁硅或镁铝硅合金涂层。 6. The weather-resistant metal support structure according to claim 5, characterized in that the magnesium alloy coating is magnesium aluminum, magnesium silicon or magnesium aluminum silicon alloy coating.
7、 根据权利要求 5所述的耐候金属支撑结构， 其特征在于， 二次涂镀镁 或镁合金涂层所形成的复合涂层后再进行热处理。 7. The weather-resistant metal support structure according to claim 5, characterized in that the composite coating formed by magnesium or magnesium alloy coating is coated twice and then heat treated.
8、 根据权利要求 1所述的耐候金属支撑结构， 其特征在于， 所述耐候金 属支撑结构应用于有尺寸精度要求的太阳能聚光光热系统支架、 太阳能聚光 光伏系统支架或分布式光伏或光热支架。 8. The weather-resistant metal support structure according to claim 1, characterized in that, the weather-resistant metal support structure is used in solar concentrator photothermal system brackets, solar concentrated photovoltaic system brackets or distributed photovoltaic systems that require dimensional accuracy. Photothermal bracket.
9、 根据权利要求 1所述的耐候金属支撑结构， 其特征在于， 所述耐候金 属支撑结构应用于有外观要求的户外设施金属件。 9. The weather-resistant metal support structure according to claim 1, characterized in that the weather-resistant metal support structure is applied to metal parts of outdoor facilities with appearance requirements.
10、 根据权利要求 9所述的耐候金属支撑结构， 其特征在于， 所述设施 金属件为标牌或护栏。
10. The weather-resistant metal support structure according to claim 9, characterized in that the facility metal parts are signs or guardrails.
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| CN104253577A (en) | 2014-12-31 |
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