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JP4288118B2 - Steel corrosion protection method - Google Patents

Steel corrosion protection method Download PDF

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Publication number
JP4288118B2
JP4288118B2 JP2003295928A JP2003295928A JP4288118B2 JP 4288118 B2 JP4288118 B2 JP 4288118B2 JP 2003295928 A JP2003295928 A JP 2003295928A JP 2003295928 A JP2003295928 A JP 2003295928A JP 4288118 B2 JP4288118 B2 JP 4288118B2
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corrosion
steel material
protective layer
steel
zinc
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JP2005060803A (en
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琢己 山縣
圭治 今村
和之 若菜
泰秀 冨松
健太郎 渡辺
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Sho Bond Corp
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Sho Bond Corp
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Description

土木構造物に用いられている鋼材の防食方法に関する。   The present invention relates to a method for preventing corrosion of steel materials used in civil engineering structures.

土木構造物に用いられている鋼材は、その立地環境に応じた防食処理、例えばメッキや防食塗装等を施し、腐食因子を防止する方法で防食対策が施されている。   Steel materials used in civil engineering structures are subjected to anticorrosion treatment by a method for preventing corrosion factors by applying anticorrosion treatment according to the location environment, for example, plating or anticorrosion coating.

鋼材の防食方法としては、表面被覆、表面改質、電気防食、耐食性鋼材の採用が挙げられる。現在では、金属又は非金属の材料で鋼材表面を被覆する方法が用いられている。   Examples of the corrosion prevention method for steel include surface coating, surface modification, cathodic protection, and the use of corrosion resistant steel. At present, a method of coating a steel surface with a metal or non-metal material is used.

しかしながら、地際近傍での雨水による乾湿の繰り返しや、海岸地域、雪国等の海塩粒子付着や凍結防止剤等による腐食進行もあり、経年変化による防食処理済み部分の腐食も現状として少なくない状況である。
塗装便覧 However, due to repeated wet and dry rain due to rain water in the vicinity of the sea, sea salt particles adhering to coastal areas, snowy countries, etc., and corrosion progression due to anti-freezing agents, etc. It is.
Painting manual

そこで、本発明では、経年変化等により生じた鋼材の局部的な腐食に対応することを目的とする。   Accordingly, an object of the present invention is to cope with local corrosion of steel materials caused by aging and the like.

本発明に係る鋼材の防食方法は、基本的には、鋼材の腐食による欠損個所に亜鉛ペーストを充填し、その上から亜鉛箔を貼り付けて遮蔽するとともに更にその上にガス抜き穴を削孔した保護層を設けることを特徴とする。これは、従来の被覆するのみの方法と異なり、充填材、及び被覆材に犠牲陽極作用をもつ材料を選定したことから、被覆作用、犠牲防食作用の複合的な効果を有する。 The steel material anticorrosion method according to the present invention is basically filled with zinc paste at a defect caused by corrosion of the steel material, covered with zinc foil from above and shielded , and a gas vent hole is further drilled thereon. A protective layer is provided . This is different from the conventional method of only coating, because the filler and the material having the sacrificial anodic action are selected for the coating material, and thus has a combined effect of the coating action and the sacrificial anticorrosive action.

上記の保護層は、好ましくはマグネットシート又は光硬化型樹脂シートからなることを特徴とする。   The protective layer is preferably made of a magnet sheet or a photocurable resin sheet.

請求項１及び請求項２において、腐食による欠損個所に亜鉛ペーストを充填し、その上から亜鉛箔を貼り付けて、鋼材に対する遮蔽構造としたので、鋼材の腐食因子である水や酸素の供給を絶ち防食効果をより確実にする。また、水の浸入があっても亜鉛の犠牲陽極作用による電気化学的防食効果を有する。 In claim 1 and claim 2 , zinc paste is filled in a defect due to corrosion, and a zinc foil is pasted thereon to form a shielding structure against the steel material. Therefore, supply of water and oxygen which are corrosion factors of the steel material is performed. Make sure the anti-corrosion effect. Moreover, even if water enters, it has an electrochemical anticorrosive effect due to the sacrificial anodic action of zinc.

請求項１において、亜鉛箔の上に保護層を設けたので、亜鉛箔の経年による剥離からの保護をすることができるとともに、保護層にガス抜き穴を形成したので、亜鉛の自己腐食時に発生するガスを外部に逃がすことができる。 In claim 1 , since the protective layer is provided on the zinc foil, it is possible to protect the zinc foil from peeling due to aging, and the protective layer is formed with a vent hole. Gas to escape to the outside.

請求項２において、保護層をマグネットシート又は光硬化型樹脂シートを使用したので、施工が容易である。 In Claim 2 , since a magnet sheet or a photocurable resin sheet is used for the protective layer, construction is easy.

本発明の実施をするための最良の形態を図面に基き説明する。   The best mode for carrying out the present invention will be described with reference to the drawings.

図１は、鋼材の腐食個所を示す断面図、図２は、腐食個所に防食を施した一例を示す断面図、図３は、図２の平面図である。   FIG. 1 is a cross-sectional view showing a corrosion portion of a steel material, FIG. 2 is a cross-sectional view showing an example in which corrosion is applied to the corrosion portion, and FIG. 3 is a plan view of FIG.

図１において、コンクリート構造物１２に貼着されている鋼板である鋼材１１に錆１３による腐食が始まっている。この腐食に対して、図２、図３に示す防食方法が実施される。   In FIG. 1, corrosion due to rust 13 has begun on a steel material 11 that is a steel plate adhered to a concrete structure 12. The anticorrosion method shown in FIGS. 2 and 3 is performed against this corrosion.

まず、錆１３を除去し、除去した個所に亜鉛ペースト１を充填する。その上からテープ状又はシート状の亜鉛箔２を貼り付けて、該個所を遮蔽する。更にその上に保護層３を重ねて貼付する。保護層３は表面から裏面を貫通するガス抜き穴４、例えば１〜２ｍｍ程度の径の小孔を多数削孔してある。保護層３は、亜鉛箔の経年による剥離に対して施工が簡易的なマグネットシート又は光硬化型の樹脂シートが用いられる。   First, the rust 13 is removed, and the removed portion is filled with the zinc paste 1. A tape-like or sheet-like zinc foil 2 is applied from above to shield the portion. Further, the protective layer 3 is laminated and pasted thereon. The protective layer 3 has a large number of gas vent holes 4 penetrating from the front surface to the back surface, for example, small holes having a diameter of about 1 to 2 mm. The protective layer 3 is made of a magnet sheet or a photo-curing resin sheet that can be easily applied to the peeling of the zinc foil over time.

本発明は、鋼道路橋等の局部的な発錆に対しての防食方法として広く利用することができる。   The present invention can be widely used as an anticorrosion method against local rusting such as steel road bridges.

鋼材の腐食個所を示す断面図である。It is sectional drawing which shows the corrosion location of steel materials. 腐食個所に防食を施した一例を示す断面図である。It is sectional drawing which shows an example which gave corrosion prevention to the corrosion location. 図２の平面図である。FIG. 3 is a plan view of FIG. 2.

１ 亜鉛ペースト
２ 亜鉛箔
３ 保護層
４ ガス抜き穴
１１ 鋼材
１２ コンクリート構造物
１３ 錆 DESCRIPTION OF SYMBOLS 1 Zinc paste 2 Zinc foil 3 Protective layer 4 Gas vent hole 11 Steel material 12 Concrete structure 13 Rust

Claims (2)

鋼材の腐食による欠損個所に亜鉛ペーストを充填し、その上から亜鉛箔を貼り付けて遮蔽するとともに更にその上にガス抜き穴を削孔した保護層を設けることを特徴とする鋼材の防食方法。   An anticorrosion method for a steel material, characterized in that a zinc paste is filled in a defective portion due to corrosion of the steel material, and a zinc foil is stuck on the surface to shield the steel material, and a protective layer having a gas vent hole drilled thereon is further provided. 保護層は、マグネットシート又は光硬化型樹脂シートからなることを特徴とする請求項１に記載の鋼材の防食方法。   The method for preventing corrosion of a steel material according to claim 1, wherein the protective layer is made of a magnet sheet or a photocurable resin sheet.
JP2003295928A 2003-08-20 2003-08-20 Steel corrosion protection method Expired - Lifetime JP4288118B2 (en)

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