JP5030928B2 - Outdoor structure and method for estimating deterioration of outdoor structure components - Google Patents

Description

  The present invention relates to an outdoor structure that can prevent salt damage in advance while constantly monitoring changes in salt damage over time.

For example, since outdoor structures such as windmills are installed on the sea or on the coast, there is a concern that transformers, control panels, and the like provided inside the windmill may be corroded by salt damage.
For this reason, it is necessary to predict salt damage according to the material inside the device and the coating.

  As evaluation methods thereof, JISZ2371 “salt spray test method”, JISK5621 “combined cycle test” and the like have been established (Non-patent Documents 1 and 2).

  In recent years, a corrosion sensor has been proposed as a sensor for predicting the amount of salt corrosion (Patent Document 2).

  Explaining this corrosion sensor: When two dissimilar metals (substrate and conductive part) are insulated from each other by insulating parts, and both ends are exposed to the environment, a water film is connected between the two metals according to the environment. Corrosion current flows. Since this current corresponds to the corrosion rate of a base metal, it is used with the corrosion sensor.

This sensor is called “Atmospheric Corrosion Monitor” or ACM type corrosion sensor.
An example of this sensor is shown in FIGS. 6, 7-1 and 7-2. As shown in these drawings, an ACM-type corrosion sensor (hereinafter referred to as “corrosion sensor”) 110 was formed as a substrate 111 by cutting a carbon steel plate having a thickness of 0.8 mm into 64 mm × 64 mm. On top of this, an insulating portion 112 of an insulating paste (thickness 30 to 35 μm) was applied and cured using a precision screen printer for thick film ICs.
Subsequently, a conductive paste (thickness 30 to 40 μm, filler: Ag) is laminated and printed on the pattern of the insulating portion 112 so as to maintain the greenness with the substrate 111, and cured to form the conductive portion 113. A corrosion sensor is configured (Non-patent Document 3).
Then, as shown in FIG. 7-2, the conductive portion 113 and the substrate 111 are short-circuited by the water film 114 such as humidity and sea salt (chloride ions or the like), and the corrosion current of the Fe-Ag galvanic pair is reduced. It is measured by an ammeter 115. Reference numerals 116a and 116b are terminals.

  In addition, a method for predicting the amount of salt damage corrosion of solar power generation system members using the ACM type corrosion sensor is proposed, and the amount of attached sea salt is estimated from the relationship diagram between humidity, measured current value, and amount of sea salt attached. Has been proposed (Non-Patent Document 4).

JP 2008-157647 A JISZ2371 JISK5621 http://www.nims.go.jp/mdss/corrosion/ACM/ACM1.htm Matsushita Electric Works (Nov. 2002) p79-85

  However, in the JISZ2371 standard test and the JISK5621 standard test, there is a problem that the test accuracy is poor because the test environment does not match the actual environment.

  Although the degree of corrosion can be estimated from the corrosion current using an ACM type corrosion sensor, most of the materials of each component constituting the outdoor component are painted, so the individual There is a problem that the degree of corrosion cannot be determined as appropriate according to the state of the coating film (the type of coating film, the thickness of the coating film, etc.).

  That is, in an outdoor structure such as a windmill or the like, outside air is introduced to prevent internal heat generation, and members according to the environment of the site considering the case where sea salt is accompanied by the outside air. It is eager to accurately grasp the timing of parts maintenance.

  This invention makes it a subject to provide the degradation estimation method of the outdoor structure which can determine the degree of corrosion according to an installation environment exactly, and an outdoor structure structural member in view of the said problem.

  According to a first aspect of the present invention for solving the above-mentioned problems, a corrosion sensor for detecting a corrosion current is provided at least at one or more locations on the outer surface of a structure exposed to the outside air environment. The substrate is made of the same material as each constituent member of the structure, covers a plurality of conductive portions provided on the surface of the substrate of the corrosion sensor via an insulating portion, and extends over the surface of the structure, It exists in the outdoor structure characterized by apply | coating the same coating film as the coating film apply | coated to the structural member.

  According to a second invention, there is provided an outdoor structure according to the first invention, wherein the corrosion sensor is irradiated with ultraviolet rays from an ultraviolet lamp.

  According to a third invention, in the first invention, the corrosion sensor is installed in a mortar-shaped depression portion installed horizontally on the outer surface of the structure, and the coating film covers a plurality of conductive portions. An outdoor structure characterized by being applied over a mortar-shaped surface and a structure surface.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the outdoor structure is a wind power generator.

  5th invention is equipped with the corrosion sensor which detects a corrosion current in at least 1 or more places of the outer surface of the structure exposed to external air environment, and the board | substrate of the said corrosion sensor is the same as each structural member of a structure And covering a plurality of conductive parts provided on the surface of the substrate of the corrosion sensor via an insulating part, and covering the surface of the structure with the same coating as the coating applied to the constituent members. An outdoor structure constituent member deterioration estimation method is characterized in that a film is applied and the degree of deterioration of each constituent member is estimated based on deterioration over time.

  According to a sixth aspect of the present invention, in the fifth aspect of the invention, there is provided a deterioration estimation method for an outdoor structure constituent member, wherein deterioration is estimated in advance by a deterioration acceleration test.

  According to the present invention, due to changes over time due to the action of corrosive factors such as sea salt and rainwater, cracks and the like occur in the same coating film applied to each constituent material, a deteriorated part is formed, and rainwater enters. However, a corrosion current flows, and thereby the degree of deterioration of the coating film of each constituent member can be determined. As a result, it is possible to individually evaluate the materials and paints corresponding to the individual materials of the constituent members of the outdoor structure.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

An outdoor structure according to Embodiment 1 of the present invention will be described with reference to the drawings.
1-1 is a schematic diagram of a corrosion sensor according to Example 1. FIG. FIG. 1-2 is a schematic view during corrosion. FIG. 2 is a plan view of the corrosion sensor according to the first embodiment. FIG. 3 is a schematic view of a wind turbine generator that is an example of an outdoor structure.
As shown in these drawings, the corrosion sensor 11A according to the present embodiment has the same material 13A as the material of each component (for example, the generator 104) of the wind power generator 100 whose substrate 12 is a structure. And covering the plurality of conductive portions 15 provided on the surface of the substrate 12 of the corrosion sensor 11 via the insulating portion 14 and over the outer surface 102a of the tower 102 of the wind turbine generator 100, A coating film 16A identical to the coating film 16A applied to (for example, the generator 104) is applied.

Here, the wind power generator 100 shown in FIG. 3 will be described. As shown in FIG. 3, the wind power generator 100 includes a tower 102 installed on the ground portion 101, for example, and a nacelle 103 provided on the upper end of the tower 102. The nacelle 103 can turn in the yaw direction and is directed in a desired direction by a nacelle turning mechanism (not shown). The nacelle 103 is equipped with a generator 104 and a speed increaser 105. The rotor of the generator 104 is joined to the main shaft 107 of the wind turbine rotor 106 via the speed increaser 105. The windmill rotor 106 includes a hub 108 connected to the main shaft 107 and blades 109 attached to the hub 108.
Here, in this embodiment, the material of the generator 104 is 13A, the coating film is 16A, the material of the speed increaser 105 is 13B, and the coating film is 16B.

Specifically, as shown in FIG. 3, the corrosion sensor 11 </ b> A- 1 is installed on the surface of the tower 102 and, for example, a coating film 16 </ b> A of a generator is applied so as to cover the surface.
Moreover, corrosion sensor 11A-2 is installed in the surface of the tower 102, and coats the coating film 16B of a gear box, for example so that the surface may be covered.

  As a result of exposure to the outside air, cracks or the like occur in the coating film 16A or 16B due to the change over time due to the action of the corrosive factor 19 such as sea salt, rainwater, etc., and the deteriorated portion 20 is formed. From this deteriorated portion 20, rainwater enters, the conductive portion 15 and the substrate 12 are short-circuited, a corrosion current flows, and deterioration can be determined by measurement by the ammeter 18. Reference numerals 17a and 17b denote terminals.

In this way, during the period until the corrosion current is detected, the evaluation of the materials and paints corresponding to the individual materials of the constituent members of the wind power generator 100 that is the structure can be performed individually. Therefore, it is possible to determine the degree of deterioration of each coating film 16A, 16B,... Of each constituent member by preparing a sensor coated with the coating films 16A, 16B,.
As a result, a construction plan for the structure and a plan for the maintenance work can be constructed.

In addition, the deterioration estimation method of the outdoor structure constituent member of the present invention applies the coating film 16A identical to the coating film 16A applied to the material 13A using the corrosion sensor 11A, and each component is deteriorated by deterioration over time. The degree of deterioration of the member is estimated.
Based on this estimation result, it is possible to construct a construction plan for the structure and a plan for its maintenance work.

  A second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a schematic diagram of a corrosion sensor according to the second embodiment. As shown in FIG. 4, the corrosion sensor 11 </ b> B according to the present example performs an acceleration test by irradiating the surface coated with the coating film 16 </ b> A with ultraviolet rays from the ultraviolet irradiation unit 20.

  In general, when a paint is irradiated with ultraviolet rays, the organic bond network of the resin is cut off and the deterioration is accelerated. Thereby, the degree of deterioration of the coating film can be determined.

  This is because the normal accelerated coating deterioration test is an ultraviolet light exposure test in an environment where there is no external cause such as sea salt, whereas the accelerated deterioration test according to the present invention is performed at the site where the external structure is installed. Since the deterioration acceleration test according to the actual environment can be performed, more accurate judgment can be performed.

  FIG. 5 shows an example of another deterioration acceleration test, which is installed in a mortar-shaped portion 32 of a mortar body 31 installed in a horizontal portion of a structure, and the coating film 16A covers a plurality of conductive portions 15 and forms a mortar shape. It is applied over the surface of the portion 32 and the surface of the structure.

  As a result, the corrosive factor 19 is always accumulated in the vicinity of the mortar-shaped depression (particularly, the sea salt components such as Na ions and Mg ions are concentrated), so that the coating film 16A is in contact. Corrosion will progress further.

Thereby, deterioration of the coating film 16A is accelerated.
Therefore, it is possible to determine the degree of deterioration of each coating film 16A, 16B,... Of each constituent member by preparing a sensor coated with the coating films 16A, 16B,.

  The above has been described by using, for example, a wind power generator as the outdoor structure of the present invention, but the present invention is not limited to this, and bridge facilities, solar cell facilities, etc. that require countermeasures against salt damage on the coast, etc. It can also be applied to. Furthermore, it can also be applied to salt damage countermeasures for moving bodies such as vehicles and ships.

  As described above, the outdoor structure according to the present invention can apply the same coating film as the coating applied to the material of each constituent member, and estimate the degree of deterioration of each constituent member based on the deterioration over time. For example, it is suitable for use in determining deterioration of components of the wind power generator.

1 is a schematic view of a corrosion sensor according to Example 1. FIG. It is the schematic at the time of corrosion. 1 is a plan view of a corrosion sensor according to Example 1. FIG. It is the schematic of the wind power generator which is an example of an outdoor structure. 6 is a schematic view of a corrosion sensor according to Example 2. FIG. 6 is a schematic view of another corrosion sensor according to Embodiment 2. FIG. It is a top view of the corrosion sensor which concerns on a prior art. It is the schematic of the corrosion sensor which concerns on a prior art. It is the schematic at the time of the corrosion of a prior art.

Explanation of symbols

11A, 11A-1, 11A-2, 11B Corrosion sensor 12 Substrate 13A, 13B Material 14 Insulating part 15 Conductive part 16A, 16B Coating 19 Corrosive factor

Claims (6)

At least one location on the outer surface of the structure exposed to the outside air environment is equipped with a corrosion sensor that detects the corrosion current,
The substrate of the corrosion sensor is made of the same material as each component of the structure,
A plurality of conductive portions provided on the surface of the corrosion sensor substrate via insulating portions are covered, and the same coating film as that applied to the component member is applied over the surface of the structure. An outdoor structure characterized by that. In claim 1,
An outdoor structure, wherein the corrosion sensor is irradiated with ultraviolet rays from an ultraviolet lamp. In claim 1,
The corrosion sensor is installed in a mortar-shaped depression placed horizontally on the outer surface of the structure,
An outdoor structure characterized in that the coating film covers a plurality of conductive parts and is applied over a mortar surface and a structure surface. In any one of Claims 1 thru | or 3,
The outdoor structure is a wind power generator. At least one location on the outer surface of the structure exposed to the outside air environment is equipped with a corrosion sensor that detects the corrosion current,
The substrate of the corrosion sensor is made of the same material as each component of the structure,
A plurality of conductive parts provided on the surface of the substrate of the corrosion sensor via insulating parts are covered, and the same coating film as that applied to the component member is applied over the surface of the structure. A deterioration estimation method for an outdoor structure component member, wherein the deterioration degree of each component member is estimated based on deterioration of change. In claim 5,
A deterioration estimation method for an outdoor structure constituent member, wherein deterioration is estimated in advance by a deterioration acceleration test.

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