JP2005077220A - Combined degradation accelerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a specific structure of a combined degradation accelerator used in common for weather resistance and corrosion resistance test or for heat resistance and water resistance test. <P>SOLUTION: In this combined degradation accelerator 1, a holding table 30 for a testing body and a salt spray device 40 are provided in a test chamber 11 with temperature and humidity controllable while a light source unit 33 is installed outside a partition board 32 attached to one surface of the test chamber 11 so as to right confront a surface of the holding table 30. As the source unit 33, light source units different in light emission characteristics are exchangeably put to attachment with their outside dimension standardized. In the test chamber 11, a washer is provided, equipped with a stream channel capable of causing washing water to flow down toward a surface of the partition board 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a composite deterioration accelerating device that causes a composite deterioration in a test specimen of an exterior material under an artificial environment in order to test the weather corrosion resistance and heat and water resistance of various exterior materials and the like.

<Weather and corrosion resistance test>
The performance of metal plates used for building exterior materials, automobile bodies, and the like is generally evaluated by weather resistance tests and corrosion resistance tests.

  As a device for the weather resistance test, there are a sunshine weather meter using a carbon arc as a light source, a xenon weather meter using a xenon lamp as a light source, and a metal halide lamp tester using a metal halide lamp as a light source. As a method or apparatus for repeating continuous irradiation or continuous irradiation and sprinkling with respect to a test body using them, for example, the “weather resistance test method for automobile parts” of JIS D0205 or the accelerated weather resistance test apparatus described in Patent Document 1 Etc. are known.

  Further, as a device for the corrosion resistance test, there is a salt spray device for continuously spraying salt water, which is defined in “Salt spray test method” of JIS Z2371. In addition, there is a combined cycle test apparatus that can repeat salt spraying, drying, and wetting as defined in JASO M609-91 “Automobile Material Corrosion Test Method”. Patent Documents 2 and 3 also propose a test method that attempts to reproduce the corrosion phenomenon more faithfully by changing a cycle such as salt spray, drying, and wetting.

  However, the metal plates used in the actual outdoor environment are steel plates that are deteriorated by light rays (visible light, ultraviolet rays, infrared rays) and heat, and are repeatedly subjected to moisture, salt, acid (acid rain), and wet / dry conditions. Corrosion occurs in a complex and continuous manner. In the test methods as described above, the weather resistance test and the corrosion resistance test are mostly performed separately, and in some studies, there are examples in which both tests are performed alternately. Deterioration and corrosion of the steel sheet cannot be promoted simultaneously and in combination.

Under such circumstances, in the Japanese Patent Application No. 2002-083394, the applicant of the present invention applied ultraviolet irradiation, salt water (neutral or neutral) in an arbitrary temperature environment assuming solar radiation in one test apparatus. Acidic spraying, watering (neutral or acidic), wetting, condensation, suspending, drying, etc. are performed continuously or intermittently, so that deterioration of the coating and corrosion of the steel sheet are simultaneously performed under conditions close to the actual environment. In addition, a method for accelerating composite deterioration that can be advanced in a complex manner is proposed.
<Heat and water resistance test>
Generally, an exterior material used for a roof or an outer wall of a building is configured by combining different kinds of materials such as a decorative material (surface material), a base material, and a reinforcing material. These exterior materials are not gradually warmed or soaked in water as a whole, but suddenly heated from the surface by solar radiation or rapidly cooled from the surface by rain, between the front and back surfaces, There is a difference in the progress and shrinkage of deterioration between the material and the base material. Therefore, in order to accurately evaluate the durability of this type of exterior material, not only the heat resistance and water resistance of each component material, but also the combined deterioration state in the state where those component materials are combined is accurately determined. It is necessary to grasp.

  However, at present, there is no established method for inspecting the state of the above-mentioned complex deterioration artificially progressing under conditions close to the actual environment. For example, asphalt roofing which is one of the typical roof materials, there is “Fatigue resistance test method for discontinuous part of the coating material for building” specified in JIS A1436. There are performance standards defined in JIS A. 5548 “Adhesives for Ceramics Tile”, but in these tests, the effects of solar heat, changes in shape due to repeated moisture absorption and drying, surface materials and groundwork A realistic deterioration state such as a decrease in adhesion to the material cannot be grasped.

Under such circumstances, in the Japanese Patent Application No. 2002-083393, the present applicant applied light irradiation and watering (neutral or acidic) in a wavelength range including infrared rays in an arbitrary temperature environment assuming solar radiation. ), A method for promoting the deterioration of composites that allows the deterioration of the surface and the interior of the exterior material to progress under conditions close to the actual environment by carrying out wet, dew condensation, rest, drying, etc. continuously or intermittently. Has proposed.
JP 63-222240 A JP-A-56-126740 JP 60-169739 A

  The present invention proposes a specific configuration of a composite deterioration accelerating device that can be commonly used in the weather corrosion resistance test and the heat and water resistance test proposed in the above Japanese Patent Application Nos. 2002-083393 and 2002-0833944. .

  In developing such a device, the present applicant sought various combinations of various conventional test devices, and in a test chamber capable of controlling the temperature and humidity, a holding stand for installing a test body, a light source, a watering device, We considered incorporating a salt spray device in a well-balanced manner. In this examination process, the light source for light irradiation emits high heat and affects the temperature and humidity control in the test room. Therefore, it is necessary to reduce this effect and facilitate the temperature and humidity control in the test room. In addition, when salt water is sprayed and filled in the test chamber, the salt remains on the surface of the light source after drying, which hinders light irradiation, and it has been found that it is necessary to prevent this.

  Among the above-mentioned problems, regarding the control of high heat generated by the light source, it is conceivable to divide the test chamber holding the test body and the light source by an opening made of a glass plate or the like and irradiate the light source through the opening. However, even in this case, there remains a problem that salt adheres to the surface of a glass plate or the like attached to the opening. As a method for preventing the adhesion of salt to the glass plate, there are a method of providing a blocking screen when spraying salt water, or a method of constantly scraping off with a wiper. However, the material and the sealing method of the shut-off screen are problems, and the mechanism is complicated. Further, since the wiper also requires a drive unit, the mechanism is complicated, and there is a problem that the glass surface is damaged.

  The present invention has been made through the above-described studies, and it is an object to propose a specific configuration of a composite deterioration accelerating device that can effectively prevent the adhesion of salt with a simple mechanism at low cost. It is said.

  In order to solve the problems as described above, the structure of the composite deterioration accelerating device of the present invention is provided on the surface of the holding table in a temperature / humidity controllable test chamber comprising a test piece holding table and a salt spray device. A light source unit provided with an opening directly facing the surface and provided with a light-transmitting partition plate on the surface is installed outside the opening, and the partition plate has a test chamber on the side of the test chamber before and after the salt spray. A cleaning device is provided for cleaning the indoor surface of the partition plate with running water.

  According to this configuration, the test chamber for placing the test body and the light source unit that generates high heat are partitioned with the translucent partition plate therebetween, so that the temperature and humidity in the test chamber can be easily controlled. Even if salt water is sprayed and filled in the test chamber, the light source unit is not affected by the salt content, so that maintenance management becomes easy.

  Furthermore, by using the cleaning device to clean the salt adhering to the surface of the partition plate, it is possible to always obtain light irradiation in a good state. If this washing is performed not only after spraying salt water but also immediately before spraying, a water film is formed on the surface of the partition plate, so that the adhesion of salt can be reduced. It becomes easier.

  Preferably, the cleaning device includes a water flow groove that allows water to flow down on the surface of the partition plate over substantially the entire width of the partition plate, and the distance between the water flow groove and the partition plate can be adjusted. According to this configuration, the water for cleaning does not splash back to the test chamber or the surface of the test body, and it is possible to effectively prevent salt adhesion with a simple mechanism with low cost.

  Further, the composite deterioration promoting apparatus of the present invention is characterized in that the surface of the holding base of the test body can be fixed within a range of an elevation angle of 20 degrees ± 10 degrees with respect to the vertical plane. By providing this elevation angle, various types of corrosion resistance tests can be performed in accordance with “Salt spray test method” of JIS Z2371. Of course, the light source unit is also arranged so as to form a depression angle of 20 ° ± 10 ° according to this.

  Moreover, the composite deterioration promoting apparatus of the present invention is characterized in that the irradiation distance can be adjusted by moving the holding base of the specimen along the optical axis direction of the irradiation light from the light source unit. According to this, even if the output of the light source decreases with the use time, for example, the illuminance distribution and temperature distribution on the surface of the specimen can be properly maintained according to the output. Moreover, the position of the test body can be changed according to the fluidity of salt water sprayed into the test chamber.

  Further, the composite deterioration promoting apparatus of the present invention is characterized in that a plurality of types of light source units having common external dimensions can be replaced. This makes it possible to test the influence of different types of light beams with a single device, and to save device procurement costs and operation costs. As the type of the light source, an ultraviolet light source such as a metal halide lamp or a xenon lamp is suitable for a weather corrosion resistance test, and a lamp-type visible / infrared light source such as an infrared lamp is suitable for a heat and water resistance test. It is possible to use other types of light sources depending on the purpose of the test.

  Moreover, the composite deterioration promoting device of the present invention may be provided with a cooling device capable of spraying cooling water toward the back surface of the holding base of the test specimen. Thereby, it becomes easy to control the back surface temperature of the test body.

  In the composite deterioration accelerating device of the present invention, the test chamber and the light source unit are partitioned with a partition plate therebetween, so that tests under various conditions are possible regardless of the type of light source, and the temperature and humidity in the test chamber are It becomes easy to control. Moreover, even if salt water is sprayed and filled in the test chamber, the light source unit is not affected by the salt content, so that the light source can be easily maintained and managed. Further, by providing a cleaning device in the test chamber that can clean the surface of the partition plate, light irradiation in a good state can always be obtained.

  As a configuration of the cleaning device, it is preferable that a water flow groove capable of allowing water to flow down on the surface of the partition plate is provided over substantially the entire width of the partition plate, and that the interval between the water flow groove and the partition plate can be adjusted. According to this, the water for washing does not splash back to the test chamber or the surface of the test body, and it is possible to effectively prevent the adhesion of salt with a simple mechanism with low cost.

  In addition, the illuminance distribution and the temperature distribution on the surface of the test body can be appropriately maintained according to the output of the light source by making the holding base of the test body movable and expanding and reducing the distance from the light source unit. If an elevation angle of 20 ° ± 10 ° is given to the holding base of the test body so that the angle can be adjusted, a corrosion resistance test based on the “salt spray test method” of JIS / Z2371 can be performed.

  Furthermore, by making the external dimensions of a plurality of types of light source units common and exchangeable, the range of utilization can be expanded, and the procurement cost and operation cost of the apparatus can be saved.

  Moreover, it becomes easy to control the back surface temperature of a test body by providing the cooling device which can cool the back surface of the holding stand of a test body in a test chamber.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment of the composite deterioration promoting apparatus of the present invention. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is an AA cross-sectional view.

  The main body of the composite deterioration accelerating device 1 has a rectangular parallelepiped shape with a side of about 2 m, a test chamber 11 is provided on the upper left side when viewed from the front, and the light source chamber 12 and the test chamber 11 are provided on the back side of the test chamber 11. Control rooms 13 are provided on the right side. A power supply unit 14 is connected to the outside of the main body.

  In the test chamber 11, there is provided a cooling chamber 16 that is partitioned by a gallery-like ventilation portion 15. A cooling coil 17 and a fan 18 installed in the cooling chamber 16, and air cooling installed under the test chamber 11. The temperature and humidity can be controlled by the type refrigerator 19, the stirring device 20 installed in the control chamber 13, the chiller unit 21 installed in the lower part of the light source chamber 12, the humidifier 22, and the like. These controls are operated through a control panel 23 provided on the front right side of the main body. Further, ducts 24 and 25 for exhaust heat and ventilation are connected to the upper portion of the cooling chamber 16 and the upper portion of the light source chamber 12. The configurations and positional relationships of the above devices are merely examples, and can be changed as appropriate according to the overall size and shape.

  In the test chamber 11, a holding table 30 for installing the test body is installed. The holding table 30 is made of a highly corrosion-resistant metal such as stainless steel or titanium, and is installed so that the holding surface of the test body forms an elevation angle θ of 20 degrees ± 10 degrees toward the back side. The holding table 30 is installed on a base 31 provided so as to have an ascending slope of an inclination angle θ when viewed from the front side, and the base 31 can change the inclination angle θ by appropriate angle adjusting means. The holding table 30 is held so that it can slide on the base 31 in the front-rear direction.

  An opening is provided between the test chamber 11 and the light source chamber 12 so as to face the holding surface of the holding table 30, and a light source unit 33 is installed outside the opening (on the light source chamber 12 side). Yes. A partition plate 32 made of transparent heat-resistant glass or the like is attached to the surface of the light source unit 33, and irradiation light from the light source unit 33 irradiates the holding surface of the holding table 30 through the partition plate 32. The light source unit 33 and the partition plate 32 are attached to the holding table 30 so as to be inclined at a depression angle θ, and the depression angle θ can also be changed by appropriate adjusting means. The light source unit 33 includes, for example, an ultraviolet light source such as a metal halide lamp or a xenon lamp, or a lamp-type visible / infrared light source such as an infrared lamp in a substantially box-shaped unit housing. The unit 33 is formed to have a common external dimension, and can be easily replaced through a detachable replacement port 34 provided on the back side of the main body.

  A salt spray device 40 is installed on the back surface (front surface) side of the holding table 30 in the test chamber 11, and a spray nozzle 41 projects upward. The salt spray device 40 is supplied with salt water from a salt water tank 42 connected to the outside. A hose 43 is pulled out from the vicinity of the salt spray device 40 and attached to the back surface of the holding table 30, and cooling water is sprayed from the hose 43 to the back surface of the holding table 30.

  In addition, near the upper portion of the partition plate 32, a cleaning device including a water flow groove 44 that allows water to flow down on the surface of the partition plate 32 is installed.

  The flowing water groove 44 is a groove having a U-shaped or concave cross section extending in the width direction of the partition plate 32, and both ends thereof are closed, and water is poured into the water from above through a hose or the like. Yes. Thereby, the water overflowing from the flowing water groove 44 flows down on the surface of the partition plate 32 in a curtain shape over substantially the entire width of the partition plate 32. The running water groove 44 is attached at a distance of several millimeters from the upper edge of the partition plate 32 and is held so that the distance to the partition plate 32 can be adjusted. Thereby, even when the depression angle θ of the partition plate 32 is changed, the water can flow down in a good state on the surface of the partition plate 32.

  Furthermore, an opening / closing door 50 for taking in and out the test body in the test chamber 11 is provided on the left side as viewed from the front of the main body. This open / close door 50 is attached so as to be opened outwardly with the front side as a suspension. When the opening / closing door 50 is attached in this way, even when the opening / closing door 50 is opened because the operator needs to check the illuminance during irradiation of ultraviolet rays or the like, the light source does not directly enter the eyes of the operator, An operator can be protected from strong light irradiation.

  Further, a shielding plate 51 capable of shielding a part of the opening surface of the opening / closing door 50 is attached to the inside of the opening / closing door 50, and is held so as to be able to be inserted and removed from the frame portion of the opening / closing door 50. The shielding plate 51 is formed with a small window hole (not shown) into which the illuminance meter and other instruments can be inserted into the test chamber 11. By attaching such a shielding plate 51, it is possible to more safely measure the state in the test chamber 11 even during irradiation with ultraviolet rays or the like.

  Since the composite deterioration accelerating device of the present invention is configured as described above, for example, salt water (neutral or acidic) spray → light irradiation in a wavelength region including ultraviolet rays or infrared rays → water spray (neutral or acidic) → high temperature and high A combined test for various deterioration factors can be performed in a cycle of wet state → condensation due to cooling → resting → drying.

  The composite deterioration accelerating device of the present invention can be widely used for durability tests of materials used as exterior materials for various facilities and machinery provided outdoors in addition to buildings and vehicles.

It is an internal top view of the composite deterioration promotion apparatus which concerns on embodiment of this invention. FIG. 2 is a front view of the composite deterioration accelerating device of FIG. 1. It is AA sectional drawing of the compound deterioration promotion apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compound deterioration promotion apparatus 11 Test chamber 30 Holding stand 40 Salt spray apparatus 32 Partition plate 33 Light source unit 44 Flowing water groove 50 Opening / closing door 51 Shielding plate

Claims (6)

  A light source having a temperature-humidity-controllable test chamber comprising a test specimen holder and a salt spray device, with an opening facing the surface of the holder, and a translucent partition plate on the surface A unit is installed outside the opening, and a cleaning device is provided on the test chamber side of the partition plate for cleaning the indoor surface of the partition plate with running water before and after salt spray. Combined deterioration promoting device.   The cleaning apparatus includes a water flow groove that allows water to flow down on the surface of the partition plate over substantially the entire width of the partition plate, and the distance between the water flow groove and the partition plate is adjustable. apparatus.   The composite deterioration accelerating device according to claim 1, wherein the surface of the holding base of the test body can be fixed in a range of an elevation angle of 20 degrees ± 10 degrees with respect to the vertical plane.   The composite deterioration accelerating device according to claim 1, wherein the irradiation distance can be adjusted by moving the holding base of the test body along the optical axis direction of the irradiation light from the light source unit.   The composite deterioration promoting apparatus according to claim 1, wherein a plurality of types of light source units having common external dimensions can be replaced.   The composite deterioration accelerating device according to claim 1, further comprising a cooling device capable of spraying cooling water toward a rear surface of the holding base of the test body.

Images