CN1118188A - 暗管用管件、相应的暗管以及保护这种管件的方法 - Google Patents

暗管用管件、相应的暗管以及保护这种管件的方法 Download PDF

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CN1118188A
CN1118188A CN94191222A CN94191222A CN1118188A CN 1118188 A CN1118188 A CN 1118188A CN 94191222 A CN94191222 A CN 94191222A CN 94191222 A CN94191222 A CN 94191222A CN 1118188 A CN1118188 A CN 1118188A
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J-M·佩杜图
G·努艾尔
J·贝罗
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Punta Muson
Pont a Mousson SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/028—Including graded layers in composition or in physical properties, e.g. density, porosity, grain size
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

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  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
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  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Sewage (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
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Abstract

具有外涂层的管件，这样的外涂层包括：第一多孔涂层，由含5～60％铝的锌/铝合金组成；在第一涂层之上的称为封孔层的第二涂层。具有这种外涂层的铸铁管件用于暗管中。

Description

暗管用管件、相应的暗管以及 保护这种管件的方法
本发明涉及由铁管件，尤其是铸铁管件组成的暗管(buriedpiping)。“管件”(pipe member)指管类以及弯头、管接头等各种附件。
土壤对黑色金属的腐蚀，是一种性质不同于大气腐蚀的现象，这种腐蚀作用的要点包括产生一些可以与处于一定距离之外的还原区电连接的氧化区。因此，产生局部损坏，这是对黑色金属的主要后果。
暗管管件的防腐保护因而极为困难，而且在下列情况下更是如此：当土质不均一、性质很不同时；按其用途，在不同的温度下用这些管件来输送某种液体时，这都会使腐蚀条件发生变化；此外，在装卸搬运将要埋设的管件过程中经常会导致对其外表面不同位置的损伤。
本发明的目的在于提供一种成本低、适于各种管道用途，尤其是供水和排水，以及适于大多数土壤中使用的铁制暗管管件的涂覆技术。本发明的目的是用于暗管的铁管件，尤其是铸铁管件，其特征是在管件上包以外涂层，所说的外涂层包括：
—含有5～60％铝的锌—铝合金的第一多孔涂层，以及于此第一涂层之上
—水性、溶剂型或粉末状的有机粘合剂或无机粘合剂的第二多孔涂层，以下叫作“封孔”涂层。
另外一些特点是：
—所说的有机粘合剂是沥青清漆、煤焦油沥青或合成的有机产品；
—所说的合成的有机产品是环氧树脂；
—所说的封孔涂层是水性涂层；
—所说的封孔涂层厚度为100～140μm；
—所说的合金层涂布量至少为200克/米2；
—所说外涂层还包括处于所述第一涂层和第二涂层之间的铬酸锌和/或磷酸锌层。
本发明的目的还在于：
—由上面定义的管件组成的暗管；以及
—防止铁管件，尤其是铸铁管件受土壤腐蚀的防护方法，这种方法包括以下步骤：
(a)电弧喷镀沉积含5～60％铝的锌一铝合金的第一涂层；然后
(b)沉积称为封孔层的第二多孔涂层。
现举本发明用于延性铁供水管或排水管管件的一个实施例。
在实施例中，如上面定义的外涂层涂布于在热处理炉中处理过，因此带有氧化铁外皮的铸铁上。
第一步采用电弧喷镀法沉积含5～60％，优选10～60％铝的锌—铝合金第一涂层。
在土壤腐蚀剂作用下，此涂层在其存在的介质中转变成稳定腐蚀产物的保护层。另外，合金层也称为铸铁的“牺牲涂层”，意思是说该层在由铸铁、合金及土壤所形成的电化学电池的作用下通过氧化而逐渐消耗，从而通过形成所说的保护层保护隐蔽于下面的铸铁或因锌—铝合金涂层的缺陷而裸露在外的铸铁表面。
由于此第一涂层是用电弧喷镀法沉积的，所以它由固化的微滴组成，因而是多孔性的。通过适当选择孔径和涂层厚度，可以控制此保护层形成的条件，尤其是形成速率。已经观察到，锌—铝合金的这种两相结构有利于锌腐蚀产物的捕集。
所以已经确定，第一涂层的沉积量应当优选至少200克/米2。
然后用喷镀法(spraying)沉积封孔涂层，这种封孔层减慢锌的腐蚀并使锌腐蚀产物层更坚固，从而保持其保护作用。此封孔层必须厚到足以保护这种抑制作用，而且还必须薄到足以使之保持多孔性，否则活性化学物质不再能够迁移到第一涂层上起上述作用。此外，此封孔层厚度大还会导致在其下面富集水形成水泡。
因此确定此封孔层厚度应当处于100～140μm范围内。
此封孔层是一种水性、溶剂型或粉末状的有机或无机粘合剂。有机粘合剂可以是沥青清漆、煤焦油沥青或合成的有机产品。后者优选环氧树脂。在另一种情况下，此封孔涂层是一种水性涂层。
第一涂层沉积后，第二涂层沉积之前可以对锌—铝合金表面作铬酸盐化或磷酸盐化处理，以便进行表面转化。这种处理是在锌—铝合金层上施以单组份或双组份铬化和/或磷化物质。
作为一个实施例，将直接从热处理炉中取出的铸铁管作如下涂覆：
—用电弧喷镀法沉积200克/米2的、含锌85％、含铝15％的锌—铝合金层；然后
—使用涂料喷枪，使用或不使用压缩空气沉积15μm厚的(干燥)表面转化物，表面转化物主要由铬酸锌、聚乙烯醇缩丁醛和磷酸组成；然后
—用涂料喷枪，使用或不使用压缩空气，沉积120μm厚(干燥)的环氧树脂封孔涂层。

Claims (12)

1.一种暗管用铁管件，尤其是铸铁管件，其特征在于这种管件上具有外涂层，该外涂层包括：
—含有5～60％铝的锌—铝合金的第一多孔涂层；以及于此第一涂层上
—水性、溶剂型或粉末状的有机或无机粘合剂的，称为“封孔层”的第二多孔涂层，其厚度在100～140μm之间。
2.按权利要求1的管件，其特征在于有机粘合剂是沥青清漆、煤焦油沥青或合成的有机产品。
3.按权利要求2的管件，其特征在于合成的有机产品是环氧树脂。
4.按权利要求1的管件，其特征在于封孔层是水性涂层。
5.按权利要求1的管件，其特征在于合金涂层用量至少为200克/米2。
6.按权利要求1-5之中任何一项的管件，其特征在于外涂层中还包括处于所述第一涂层和第二涂层之间的铬酸锌和/或磷酸锌层。
7.由权利要求1-6中任何一项的管件组成的暗管。
8.防止权利要求1-6项中任何一项的铁管件，尤其是铸铁管件受土壤腐蚀的保护方法，包括以下的步骤：(a)电弧喷镀法沉积含5～60％铝的锌一铝合金第一涂层，然后(b)沉积称为封孔层的第二多孔涂层。
9.按权利要求8的方法，其特征在于合金涂层沉积的量至少为200克/米2。
10.按权利要求8或9的方法，其特征在于用喷镀法(spraying)沉积第二涂层。
11.按权利要求8～10中任何一项的方法，其特征在于第二涂层的沉积厚度为100～140μm。
12.按权利要求7～11中任何一项的方法，其特征在于在步骤(a)和步骤(b)之间包括通过铬酸盐化和/或磷酸盐化作用进行表面转化的步骤。
CN94191222A 1993-02-18 1994-02-17 暗管用管件以及保护这种管件的方法 Expired - Lifetime CN1041457C (zh)

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FR93/01862 1993-02-18
FR9301862A FR2701754B1 (fr) 1993-02-18 1993-02-18 Elément de tuyauterie pour canalisation enterrée, canalisation enterrée correspondante, et procédé de protection d'un tel élément de tuyauterie.

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CN101134868B (zh) * 2006-08-31 2010-05-12 上海宝钢设备检修有限公司 一种热喷涂涂层封孔剂及其使用方法
CN104411859A (zh) * 2012-06-29 2015-03-11 圣戈班穆松桥 埋地式铁基管件的外涂层、涂层管件和沉积该涂层的方法
CN105492648A (zh) * 2013-09-02 2016-04-13 圣戈班穆松桥 铁类地下管道构件的外涂层、涂覆后的管道构件及涂层沉积法

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FR2748278B1 (fr) * 1996-05-02 1998-05-29 Pont A Mousson Procede et installation de metallisation de tuyaux en fonte
JP3354818B2 (ja) * 1996-12-20 2002-12-09 株式会社クボタ ダクタイル鋳鉄管の外面防食方法
US6253839B1 (en) * 1999-03-10 2001-07-03 Ti Group Automotive Systems Corp. Refrigeration evaporator
US20040121181A1 (en) * 2001-05-01 2004-06-24 Call Edwin Young System for protection of submerged marine surfaces
US20060000183A1 (en) * 2001-12-20 2006-01-05 Farwest Steel Corporation Method and apparatus for anticorrosive coating
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