JP2013040362A - Spraying coating member - Google Patents
Spraying coating member Download PDFInfo
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- JP2013040362A JP2013040362A JP2011176644A JP2011176644A JP2013040362A JP 2013040362 A JP2013040362 A JP 2013040362A JP 2011176644 A JP2011176644 A JP 2011176644A JP 2011176644 A JP2011176644 A JP 2011176644A JP 2013040362 A JP2013040362 A JP 2013040362A
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Abstract
Description
本発明は、表面に金属溶射によって形成された溶射被覆層を有する鉄製または鋼製の溶射被覆部材に関する。 The present invention relates to an iron or steel thermal spray coating member having a thermal spray coating layer formed on a surface by metal thermal spraying.
表面に金属溶射によって形成された溶射被覆層（以下、単に「被覆層」とも記す。）を有する鉄製または鋼製の溶射被覆部材は、幅広く使用されており、特に耐食性が要求される用途等によく使用される。このような溶射被覆部材としては、亜鉛とアルミニウムの合金や擬合金の被覆層を有し、その犠牲陽極作用によって基材を保護するものがよく知られている（例えば、特許文献１参照。）。 Iron or steel thermal spray coating members having a thermal spray coating layer (hereinafter also simply referred to as “coating layer”) formed by metal spraying on the surface are widely used, especially for applications that require corrosion resistance. Often used. As such a thermal spray coating member, one having a coating layer of an alloy of zinc and aluminum or a pseudo alloy and protecting the base material by its sacrificial anodic action is well known (for example, see Patent Document 1). .
ところで、上記のような溶射被覆部材の被覆層を形成する金属材料の一つである亜鉛は、その入手先の多くを輸入に頼っており、国内で十分な量を確保できなくなる事態が今後発生しないとも限らない。このため、亜鉛を含まずに従来と同等以上の防食性能を発揮する溶射被覆層を形成する技術の確立が急がれるようになってきている。 By the way, zinc, which is one of the metal materials that form the coating layer of the above-mentioned thermal spray coating member, relies on imports for many of its sources, and there will be a situation where it will not be possible to secure a sufficient amount in the future. Not necessarily. For this reason, establishment of the technique which forms the sprayed coating layer which does not contain zinc and exhibits the anticorrosion performance equivalent to the past or more is getting urgent.
このような要求に対しては、溶射被覆部材の被覆層を形成する金属材料として、強固な保護膜が優れた防食性能を発揮するアルミニウムや、より防食性能の高いマグネシウム含有アルミニウム合金を単独で用いることが考えられるが、その場合には、被覆層の表面に孔食が発生しやすくなり、外観性に問題が生じてしまう。また、その孔食の部分から鉄製または鋼製の基材が腐食してしまうおそれもある。 In response to such a requirement, as the metal material for forming the coating layer of the thermal spray coating member, aluminum having a strong protective film that exhibits excellent anticorrosion performance or a magnesium-containing aluminum alloy having higher anticorrosion performance is used alone. However, in that case, pitting corrosion is likely to occur on the surface of the coating layer, which causes a problem in appearance. Further, the iron or steel base material may corrode from the pitting portion.
本発明の課題は、溶射被覆層に亜鉛を使用することなく耐食性と外観性を両立させた溶射被覆部材を提供することである。 An object of the present invention is to provide a thermal spray coating member that achieves both corrosion resistance and appearance without using zinc in the thermal spray coating layer.
上記の課題を解決するために、本発明は、鉄製または鋼製の基材の表面に金属溶射による溶射被覆層が形成された溶射被覆部材において、前記溶射被覆層を、マグネシウムを含有するアルミニウム合金層とケイ素を含有するアルミニウム合金層とを混成した擬合金層としたのである。 In order to solve the above-mentioned problems, the present invention provides a thermal spray coating member in which a thermal spray coating layer is formed on a surface of an iron or steel base material by metal spraying, and the thermal spray coating layer is formed of an aluminum alloy containing magnesium. This is a pseudoalloy layer in which a layer and an aluminum alloy layer containing silicon are mixed.
上記の構成によれば、溶射被覆層をアルミニウムやマグネシウム含有アルミニウム合金で形成した場合と同等の耐食性を有し、しかもその表面に孔食のない溶射被覆部材が得られる。 According to said structure, the thermal spray coating member which has corrosion resistance equivalent to the case where a thermal spray coating layer is formed with aluminum or a magnesium containing aluminum alloy, and there is no pitting corrosion on the surface is obtained.
上述したように、本発明の溶射被覆部材は、表面の溶射被覆層を、マグネシウムを含有するアルミニウム合金層とケイ素を含有するアルミニウム合金層とを混成した擬合金層としたものであり、被覆層を形成する金属材料として亜鉛を使用することなく、優れた耐食性と外観性を確保することができる。したがって、亜鉛が入手困難となった場合にも、安定して製造・使用することができる。 As described above, the thermal spray coating member of the present invention is such that the thermal spray coating layer on the surface is a pseudo-alloy layer in which an aluminum alloy layer containing magnesium and an aluminum alloy layer containing silicon are mixed, and the coating layer Excellent corrosion resistance and appearance can be ensured without using zinc as the metal material for forming the film. Therefore, even when zinc is difficult to obtain, it can be stably manufactured and used.
本発明の実施形態の溶射被覆部材は、鉄製または鋼製の基材の表面に、金属溶射によってマグネシウムを５ｍａｓｓ％含有するアルミニウム合金層とケイ素を１２ｍａｓｓ％含有するアルミニウム合金層とが混じり合った擬合金層（溶射被覆層）を形成したものである。 The thermal spray coating member according to the embodiment of the present invention is a pseudo-spray member in which an aluminum alloy layer containing 5 mass% magnesium and an aluminum alloy layer containing 12 mass% silicon are mixed by metal spraying on the surface of an iron or steel base material. An alloy layer (thermal spray coating layer) is formed.
以下、上記実施形態の溶射被覆部材の耐食性を確認するために行った耐食試験について説明する。その試験片は、サンドブラスト処理を施した１５０ｍｍ×７０ｍｍ×１．６ｍｍの軟鋼板に、マグネシウムを５ｍａｓｓ％含有するアルミニウム合金の線材と、ケイ素を１２ｍａｓｓ％含有するアルミニウム合金の線材とを体積比１：１でアーク溶射して、１３０ｇ／ｍ２の擬合金層を形成したものを用いた（実施例）。 Hereinafter, the corrosion resistance test performed in order to confirm the corrosion resistance of the thermal spray coating member of the said embodiment is demonstrated. The test piece has a volume ratio of 150 mm × 70 mm × 1.6 mm mild steel plate subjected to sandblasting to an aluminum alloy wire containing 5 mass% of magnesium and an aluminum alloy wire containing 12 mass% of silicon. An arc sprayed coating was used to form a 130 g / m 2 pseudoalloy layer (Example).
また、比較例として、溶射被覆層をアルミニウムのみで形成した試験片を作製した。その作製方法は、実施例の場合と溶射用の金属線材の材質が異なるだけで、同じ溶射方法でほぼ同量の被覆層が形成されるようにした。各試験片の構成を表１に示す。 Further, as a comparative example, a test piece in which the thermal spray coating layer was formed only from aluminum was produced. The production method was such that the same amount of the coating layer was formed by the same thermal spraying method except that the metal wire material for thermal spraying was different from that of the example. Table 1 shows the configuration of each test piece.
そして、各試験片の中央部に一辺が５０ｍｍのクロスカットを下地に達するように入れた後、各試験片に対して、ＪＩＳ Ｋ５６００−７−９に規定されるサイクル腐食試験（サイクルＡ：塩水噴霧２ｈｒ→乾燥４ｈｒ→湿潤２ｈｒのサイクルを繰り返す）を行い、その途中で試験片を週１回程度塩水に漬けて参照電極（飽和銀・塩化銀電極）に対する電位を測定した。その測定結果を図1に示す。 Then, after putting a crosscut having a side of 50 mm in the center of each test piece so as to reach the ground, a cycle corrosion test (cycle A: salt water) defined in JIS K5600-7-9 is performed on each test piece. The cycle of spraying 2 hr → drying 4 hr → wetting 2 hr was repeated), and the test piece was immersed in salt water once a week during the course of the measurement, and the potential with respect to the reference electrode (saturated silver / silver chloride electrode) was measured. The measurement results are shown in FIG.
図１から、実施例の電位は比較例とほぼ同じ推移を示しており、実施例が比較例と同等の耐食性を有していることがわかる。また、試験後の各試験片の表面を観察したところ、比較例では多数の孔食が発生していたが、実施例の表面に孔食は見られなかった。 FIG. 1 shows that the potential of the example shows almost the same transition as that of the comparative example, and the example has the same corrosion resistance as that of the comparative example. Moreover, when the surface of each test piece after a test was observed, many pitting corrosion had generate | occur | produced in the comparative example, but pitting corrosion was not seen on the surface of the Example.
上記の耐食試験の結果から、実施形態の溶射被覆部材は、その被覆層をアルミニウムで形成した場合と同等の耐食性を有し、かつ外観性に優れたものとなることが確認された。 From the results of the above corrosion resistance test, it was confirmed that the thermal spray coating member of the embodiment has the same corrosion resistance as that in the case where the coating layer is formed of aluminum and has excellent appearance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011176644A JP5733668B2 (en) | 2011-08-12 | 2011-08-12 | Thermal spray coating |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011176644A JP5733668B2 (en) | 2011-08-12 | 2011-08-12 | Thermal spray coating |
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|---|---|
| JP2013040362A true JP2013040362A (en) | 2013-02-28 |
| JP2013040362A5 JP2013040362A5 (en) | 2013-04-11 |
| JP5733668B2 JP5733668B2 (en) | 2015-06-10 |
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| JP2011176644A Active JP5733668B2 (en) | 2011-08-12 | 2011-08-12 | Thermal spray coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695834A (en) * | 2013-12-24 | 2014-04-02 | 刘天寅 | Method for spraying titanium coating on substrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695834A (en) * | 2013-12-24 | 2014-04-02 | 刘天寅 | Method for spraying titanium coating on substrate |
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