JP2010085144A - Testing equipment for testing acceleration of atmospheric corrosion - Google Patents

Testing equipment for testing acceleration of atmospheric corrosion Download PDF

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JP2010085144A
JP2010085144A JP2008252155A JP2008252155A JP2010085144A JP 2010085144 A JP2010085144 A JP 2010085144A JP 2008252155 A JP2008252155 A JP 2008252155A JP 2008252155 A JP2008252155 A JP 2008252155A JP 2010085144 A JP2010085144 A JP 2010085144A
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salt water
salt
corrosion
test
specimen
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Kazumi Fujii
和美 藤井
Katsuto Takahashi
克仁 高橋
Takeya Ohashi
健也 大橋
Toru Miyasaka
徹 宮坂
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Hitachi Ltd
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Hitachi Ltd
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Priority to PCT/JP2009/003576 priority patent/WO2010038343A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/002—Test chambers

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein the corrosion caused by the adhesion of flying salt particles in the natural environment can not be reproduced, and the irregularity of atomizing is yet large at the same time in conventional testing equipment for testing the acceleration of atmospheric corrosion and the irregularity of the adhesion amount of salt particles in a testing tank can not be controlled. <P>SOLUTION: The acceleration test of atmospheric corrosion is achieved by this testing equipment for testing the acceleration of atmospheric corrosion controlling the diameter of the liquid droplet of salt water to be bonded to a testing target and the adhesion position of the liquid droplet and capable of uniformly adhering the liquid droplets of salt water to the testing target without flocculating the liquid droplets of salt water attached to the testing target. The testing equipment for testing the acceleration of atmospheric corrosion is concretely constituted of: a thermostatic and humidistatic tank; a corrosion testing target stand on which a corrosion testing target is placed; a washing mechanism; and a salt water discharging mechanism for atomizing the salt water to the corrosion testing target. The relation between the diameter (r) of the liquid droplet of the salt water and the diameter (R) of the liquid droplet controlled by the salt water discharging mechanism is r≤1.1R, and the relation between the interval (L) between the liquid droplets attached to the surface of the corrosion testing target, and the diameter (R) of the liquid droplet controlled by the salt water discharging mechanism is of an interval of L≥1.2R or more. A predetermined amount of salt water is attached to the surface of the corrosion testing target per a unit area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、大気中で使用される金属材料の腐食形態を再現できる腐食促進試験装置に係り、特に腐食を促進させる化学物質を被試験体に均一に付着させる装置に関する。   The present invention relates to a corrosion accelerating test apparatus capable of reproducing the corrosion form of a metal material used in the atmosphere, and more particularly to an apparatus for uniformly attaching a chemical substance that promotes corrosion to a test object.

大気腐食の促進試験法としては、JIS Z 2371で規定されている塩水噴霧試験方法やJIS K 5600-7-9で規定されているサイクル腐食試験方法が知られており、規格に準拠した試験装置が用いられている。従来の試験装置では、腐食を促進させる化学物質として所定の濃度に調整された塩水を用い、この塩水を噴霧塔からミスト状に噴霧して被試験体に付着させる方法を採用していた。この塩水の噴霧量に関しては、試験槽内の塩水の採取位置によるバラツキが少ないことが、試験装置の精度として要求されている。塩水噴霧のバラツキを小さくする方法として、例えば、噴霧塔を二重構造とすることにより改善する方法が特許として公開されている。   As an accelerated test method for atmospheric corrosion, the salt spray test method specified in JIS Z 2371 and the cycle corrosion test method specified in JIS K 5600-7-9 are known. Is used. A conventional test apparatus employs a method in which salt water adjusted to a predetermined concentration is used as a chemical substance that promotes corrosion, and this salt water is sprayed in a mist form from a spray tower to adhere to a test object. As for the spray amount of the salt water, it is required as the accuracy of the test apparatus that there is little variation depending on the salt water collection position in the test tank. As a method for reducing variations in salt spray, for example, a method for improving the spray tower by making the spray tower have a double structure is disclosed as a patent.

一方、霧状された噴霧された塩水が試験体に付着すると、噴霧された液滴が凝集して表面でぬれた状態になり、自然環境で飛来する海塩粒子のサイズが数１０μｍ程度であるのと大きく異なる。その結果、実際の自然環境中に置かれている材料の腐食状態とはかけ離れているものであった。自然環境で飛来する塩粒子の付着状況を再現する方法としては、発生させた塩粒子を一定の緩衝空間を飛来させた後に被試験体に付着させることにより再現する方法が特許として公開されている。   On the other hand, when the sprayed salt water sprayed adheres to the specimen, the sprayed droplets aggregate and become wet on the surface, and the size of the sea salt particles flying in the natural environment is about several tens of μm. It is very different. As a result, it was far from the corrosive state of the material placed in the actual natural environment. As a method for reproducing the adhesion state of salt particles flying in the natural environment, a method for reproducing the generated salt particles by allowing them to adhere to a test object after flying in a certain buffer space has been published as a patent. .

特許第２０３１３６５号公報Japanese Patent No. 2031365 特許第３６６８７４３号公報Japanese Patent No. 3668743

上記、塩水を噴霧することにより塩粒子を付着させる方法では、自然環境で飛来する塩粒子の付着による腐食を再現できないのと同時に、噴霧のバラツキが未だ大きく、試験装置内での被試験体の設置位置によるバラツキが十分に解消できていない課題がある。また、塩粒子を一定空間飛来させて付着させる方法では、自然環境で飛来する塩粒子を再現できても、試験槽内における塩粒子付着量のバラツキを制御できない課題がある。   The above-described method of adhering salt particles by spraying salt water cannot reproduce corrosion due to adhesion of salt particles flying in the natural environment, and at the same time, the spray variation is still large, and the test object in the test apparatus is There is a problem that variation due to the installation position cannot be sufficiently resolved. In addition, the method in which the salt particles are allowed to fly in a fixed space has a problem that even if the salt particles flying in the natural environment can be reproduced, the variation in the amount of salt particles deposited in the test tank cannot be controlled.

本発明の目的は、自然環境で飛来する塩粒子を再現すると同時に試験槽内での被試験体の設置位置によるバラツキを小さくできる試験装置を提供することにある。   An object of the present invention is to provide a test apparatus capable of reproducing salt particles flying in a natural environment and at the same time reducing variation due to the installation position of a test object in a test tank.

前記目的を達成する発明の要旨は次の通りである。   The gist of the invention for achieving the object is as follows.

大気腐食促進試験装置は、恒温恒湿槽，被試験体を保持する架台，被試験体に付着した塩粒子を洗浄する機構，塩水を付着させる機構から構成され、被試験体に付着させる塩水液滴の直径と液滴の付着位置を制御し、被試験体に付着した塩水液滴を凝集させずに均一に付着させることにより達成される。ここで、付着させる塩水液滴の目標直径（Ｒ）と被試験体に実際に付着した塩水液滴の直径（ｒ）との関係は、ｒ≦１.１Ｒであり、かつ、付着した液滴間隔（Ｌ）と付着させる塩水液滴の目標直径との関係が、Ｌ≧１.２Ｒ以上の等間隔で付着させることにより、達成される。   The atmospheric corrosion acceleration test device is composed of a constant temperature and humidity chamber, a gantry for holding the test object, a mechanism for cleaning salt particles adhering to the test object, and a mechanism for adhering salt water, and a salt water solution adhering to the test object This is achieved by controlling the diameter of the droplet and the deposition position of the droplet, and uniformly depositing the salt water droplet adhered to the test object without agglomerating. Here, the relationship between the target diameter (R) of the salt water droplet to be adhered and the diameter (r) of the salt water droplet actually adhered to the DUT is r ≦ 1.1R, and the adhered droplet. The relationship between the distance (L) and the target diameter of the salt water droplet to be deposited is achieved by depositing at equal intervals of L ≧ 1.2R.

本発明の大気腐食促進試験装置では、自然環境を模擬できる塩水液滴を付着でき、かつ、試験槽内で均一に塩水液滴を付着できるため、大気腐食環境を再現するとともに試験槽内の被試験体の設置位置によるバラツキが小さくなり、試験精度を向上できる効果がある。   In the atmospheric corrosion acceleration test apparatus of the present invention, salt water droplets that can simulate the natural environment can be attached, and salt water droplets can be uniformly attached in the test tank. There is an effect that the variation due to the installation position of the test body is reduced and the test accuracy can be improved.

以下、本発明の詳細について実施例を用い説明する。   Hereinafter, the details of the present invention will be described using examples.

図１に、本実施例の大気腐食促進試験装置の構成図を示す。大気腐食促進試験装置は、温度と湿度が独立に制御でき、かつ、恒温恒湿槽内の温度と湿度の複数の組み合わせ条件を連続的に変化させて保持できる温湿度設定機能を有するプログラム制御可能な恒温恒湿槽１，塩分を付着させるために塩水を吐出するための塩水吐出機構２，試験体に付着した塩分を洗浄除去するための洗浄機構を備えた塩分洗浄・乾燥室３，被腐食試験体を保持するための被腐食試験体架台４から構成されており、図中では板状試験材５が架台上に設置されている。   In FIG. 1, the block diagram of the atmospheric corrosion promotion test apparatus of a present Example is shown. The atmospheric corrosion acceleration test equipment can be controlled by temperature and humidity independently, and can be controlled by a program that has temperature and humidity settings that can maintain multiple combinations of temperature and humidity in a constant temperature and humidity chamber. Constant temperature and humidity chamber 1, salt water discharge mechanism 2 for discharging salt water to adhere salt, salt washing / drying chamber 3, equipped with a washing mechanism for removing salt attached to the test specimen 3, corrosion It consists of a corroded test specimen gantry 4 for holding the test specimen, and in the figure, a plate-like test material 5 is installed on the cradle.

次に、この大気腐食促進試験装置における試験手順を示す。先ず、板状試験材を洗浄および乾燥させた後に、被腐食試験体架台の全面に並べる。被腐食試験体架台に設置された板状試験材が塩分洗浄・乾燥室内に設置された塩水吐出機構の下を通過する際に塩水吐出機構から、板状試験材に向けて塩水が吐出されることにより、板状試験材の表面に所定量の塩水が付着される。この試験材をプログラム制御された恒温恒湿槽内に挿入して腐食試験を開始する。塩水が付着した板状試験材は、恒温恒湿槽内で所定の温湿度が組み合わせられた温湿度サイクルの環境で腐食試験される。今回、板状試験材の挿入後の温湿度サイクルとして、先ず、６０℃相対湿度３５％ＲＨの乾燥環境で３時間板状試験材を乾燥させた後に４０℃相対湿度９５％ＲＨの湿潤環境に３時間保持するサイクルを１２回繰り返した。ここで、乾燥環境から湿潤環境、あるいは、湿潤環境から乾燥環境への移行時間は、各々１時間とし、一連のサイクルを８時間に設定した。乾燥と湿潤の組み合わせ環境に板状試験材を１２サイクル計９６時間暴露した後、被腐食試験架台に設置された板状試験材は、塩分洗浄・乾燥室を通じて、取り出される。塩分洗浄・乾燥室内には、水洗用のノズルと温風乾燥ノズルが設置されており、先ず水洗ノズルから清浄な水が板状試験材に所定量放水されて板状試験材に付着していた塩分が洗い流される。続いて、温風乾燥ノズルから温風が板状試験材に吹き付けられて乾燥する。ここで、水洗水の温度を３０℃，温風の温度を５０℃に設定した。この一連の塩水付着，温湿度サイクルと洗浄乾燥工程を繰り返すことにより腐食試験を継続した。温湿度サイクルでの乾燥・湿潤を４週間、または８週間繰り返し、その中で、週に二回、塩分付着工程及び洗浄工程を行った。   Next, a test procedure in this atmospheric corrosion acceleration test apparatus will be shown. First, after the plate-shaped test material is washed and dried, it is arranged on the entire surface of the corrosion test specimen mount. When the plate-shaped test material installed on the corroded test specimen base passes under the salt water discharge mechanism installed in the salt washing / drying chamber, salt water is discharged from the salt water discharge mechanism toward the plate-shaped test material. As a result, a predetermined amount of salt water adheres to the surface of the plate-shaped test material. The test material is inserted into a constant temperature and humidity chamber under program control, and a corrosion test is started. The plate-like test material to which salt water is adhered is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in a constant temperature and humidity chamber. This time, as a temperature and humidity cycle after the insertion of the plate-shaped test material, first, the plate-shaped test material was dried for 3 hours in a dry environment of 60 ° C. and a relative humidity of 35% RH, and then a wet environment of 40 ° C. and a relative humidity of 95% RH The cycle for 3 hours was repeated 12 times. Here, each transition time from the dry environment to the wet environment or from the wet environment to the dry environment was set to 1 hour, and a series of cycles was set to 8 hours. After exposing the plate-like test material to a combined environment of dry and wet for 96 cycles for a total of 96 hours, the plate-like test material placed on the corrosion test stand is taken out through a salt cleaning / drying chamber. In the salt washing / drying chamber, a water washing nozzle and a hot air drying nozzle were installed. First, a predetermined amount of clean water was discharged from the water washing nozzle onto the plate test material and adhered to the plate test material. The salt is washed away. Subsequently, the hot air is sprayed from the hot air drying nozzle onto the plate-shaped test material and dried. Here, the temperature of the washing water was set to 30 ° C., and the temperature of the hot air was set to 50 ° C. The corrosion test was continued by repeating this series of salt water adhesion, temperature / humidity cycle and washing / drying process. Drying / wetting in a temperature / humidity cycle was repeated for 4 weeks or 8 weeks, in which a salt adhesion step and a washing step were performed twice a week.

図２は本実施例における塩水吐出機構を示した図である。塩水吐出機構は、塩水を供給する塩水口６，吐出機構内の塩水を排出するための排水口７，塩水吐出機構内を洗浄する清浄水を供給する吸水口８の給排気口があり、塩水吐出機構内の塩水を塩水吐出口９の直上に設置されているピストン１０を駆動することにより、塩水吐出口から板状試験材に向けて塩水が吐出される。吐出された塩水が液滴１１となり板状試験材に付着した状態を図３に示す。塩水吐出機構の吐出口直径やピストンの駆動条件と被腐食試験体架台の移動速度を制御することにより、板状試験材に付着する塩水液滴の量を制御することができる。先ず、塩水吐出口の直径とピストンの駆動条件を詳細に検討し、液滴直径を６０μｍに制御することを試みた結果、板状試験材に付着した塩水の直径を６０±５μｍ、すなわち、吐出機構の制御で設定した液滴直径（Ｒ）が板状試験材に実際に付着した液滴直径（ｒ）の１.１倍以内に制御できた。さらに、ピストンの駆動条件と被腐食試験体架台の移動速度の関係から、吐出した液滴が凝集せずに実際の環境に近い状態の塩分付着を再現するためには、液滴の間隔（Ｌ）が吐出機構の制御で設定した液滴直径（Ｒ）の１.２倍以上必要なことが判明した。   FIG. 2 is a view showing a salt water discharge mechanism in the present embodiment. The salt water discharge mechanism has a salt water inlet 6 for supplying salt water, a drain outlet 7 for discharging salt water in the discharge mechanism, and a water intake / exhaust port 8 for supplying clean water for cleaning the salt water discharge mechanism. By driving the piston 10 installed immediately above the salt water discharge port 9 with salt water in the discharge mechanism, salt water is discharged from the salt water discharge port toward the plate-shaped test material. FIG. 3 shows a state in which the discharged salt water becomes droplets 11 and adheres to the plate-shaped test material. By controlling the discharge port diameter of the salt water discharge mechanism, the driving condition of the piston, and the moving speed of the corrosion test specimen mount, the amount of salt water droplets adhering to the plate-like test material can be controlled. First, the diameter of the salt water discharge port and the driving condition of the piston were examined in detail, and as a result of trying to control the droplet diameter to 60 μm, the diameter of the salt water adhering to the plate-like test material was 60 ± 5 μm, that is, the discharge The droplet diameter (R) set by the mechanism control could be controlled within 1.1 times the droplet diameter (r) actually adhered to the plate-shaped test material. Furthermore, from the relationship between the driving conditions of the piston and the moving speed of the corrosion test specimen mount, in order to reproduce the adhesion of salt in a state close to the actual environment without agglomerating the discharged droplets, the interval between the droplets (L ) Is required to be 1.2 times or more the droplet diameter (R) set by controlling the discharge mechanism.

繰り返し再現性は、所定の面積内に一定量の塩水が付着しているか、所定の面積のうち、任意の単位面積にそれぞれ一定量の塩水が付着しているか、さらに複数回の塗布で、毎回一定量の塩水が付着するかどうかで判断される。   Repeatability is determined by whether a certain amount of salt water adheres within a predetermined area, or a certain amount of salt water adheres to an arbitrary unit area of the predetermined area, or more than once in each application. It is judged whether a certain amount of salt water adheres.

以上から、実際の環境に近い状態で塩分を付着させる条件は、被腐食試験体表面に付着した塩水の液滴直径（ｒ）と塩水吐出機構で制御された液滴の直径（Ｒ）との関係がｒ≦１.１Ｒであり、かつ、被腐食試験体表面に付着した液滴の間隔（Ｌ）と塩水吐出機構で制御された液滴の直径との関係がＬ≧１.２Ｒ以上の等間隔で被腐食試験体表面に塩水を付着させることである。   From the above, the condition for depositing salt in a state close to the actual environment is that the salt water droplet diameter (r) adhering to the surface of the specimen to be corroded and the droplet diameter (R) controlled by the salt water discharge mechanism. The relationship is r ≦ 1.1R, and the relationship between the interval (L) between the droplets adhering to the surface of the specimen to be corroded and the diameter of the droplet controlled by the salt water discharge mechanism is L ≧ 1.2R or more. It is to make salt water adhere to the surface of the specimen to be corroded at regular intervals.

さらに、吐出させる塩水中の塩分濃度を制御することにより、板状試験材に付着する付着塩分量を制御できる範囲を検討した。図４は図３の付着形態において、塩分付着量と塩水液滴の直径あるいは液滴中の塩分濃度との関係を検討した図である。ここでは、塩分としてＮａＣｌを用い、０.００３５mass％から３５mass％まで変化させて塩付着量を検討した。検討結果から、板状試験材に付着した塩水液滴の直径を１０〜３００μｍに制御し塩水中のＮａＣｌ濃度を制御することにより、塩分付着量を０.１〜１００００mg／ｍ2に制御でき、実際の環境で飛来する塩分の付着状態を広範囲の付着量で再現できることが確認できた。 Furthermore, the range which can control the amount of adhesion salt adhering to a plate-shaped test material was examined by controlling the salt concentration in the salt water to discharge. FIG. 4 is a diagram in which the relationship between the amount of attached salt and the diameter of the salt water droplet or the concentration of salt in the droplet is examined in the attached form of FIG. Here, NaCl was used as the salinity, and the salt adhesion amount was examined by changing from 0.0033 mass% to 35 mass%. From the examination results, the salt adhesion amount can be controlled to 0.1 to 10000 mg / m 2 by controlling the diameter of the salt water droplets adhering to the plate-shaped test material to 10 to 300 μm and controlling the NaCl concentration in the salt water. It was confirmed that the adhesion state of salt flying in the actual environment can be reproduced with a wide range of adhesion amounts.

本実施例に示した大気腐食促進試験装置を用いて、被腐食試験体架台の面内における塩分付着量のバラツキを検討した。６００mm×９００mmの面積を有する被腐食試験体架台に１００mm×１００mmの試験材計４０枚並べた。ここでは、試験材としてチタンを用いた。前記と同様の方法で、塩水吐出機構から塩分付着量として１ｇ／ｍ2付着するように制御して、試験材に塩分を付着させた。恒温恒湿槽内で乾燥させた後にそのそのまま試験材を取り出し、試験材表面に付着した塩分量を電子天秤で計測したところ、試験材一枚当たりに付着していた塩分量は、最大０.０１１０ｇ（１.１ｇ／ｍ2），最小０.００９２ｇ（０.９２ｇ／ｍ2）であった。すなわち、試験片表面任意の１cm2の面において、試験片表面に付着した塩の質量（ｍ）と制御した塩分付着量（Ｍ）とが、ｍ≦１.１Ｍの関係で試験片表面に塩分が均一に付着したことになる。 Using the atmospheric corrosion acceleration test apparatus shown in the present example, the variation in the amount of adhering salt in the surface of the corrosion test specimen mount was examined. A total of 40 test materials of 100 mm × 100 mm were arranged on a corrosion test specimen mount having an area of 600 mm × 900 mm. Here, titanium was used as a test material. In the same manner as described above, the salt water was attached to the test material by controlling the salt water discharge mechanism so that the amount of salt attached was 1 g / m 2 . After drying in a constant temperature and humidity chamber, the test material was taken out as it was, and when the amount of salt attached to the surface of the test material was measured with an electronic balance, the amount of salt attached per test material was a maximum of 0. 0110 g (1.1 g / m 2 ), minimum 0.00092 g (0.92 g / m 2 ). That is, on the surface of 1 cm 2 on the surface of the test piece, the mass of salt adhering to the surface of the test piece (m) and the controlled salt content (M) are in the relationship of m ≦ 1.1M. Is attached uniformly.

上記実施例が示すように、塩水吐出機構から吐出し試験材表面に付着する塩水液滴の直径とその液滴の間隔、および、吐出する塩水中の塩分濃度が制御された大気腐食促進試験装置を用いることにより、実際の環境中で飛来する塩分状態を再現することができると同時に、試験材の設置位置による塩分付着量のバラツキを少なくすることができ、大気腐食促進試験の繰り返し再現性を向上することができる。   As shown in the above embodiment, the atmospheric corrosion acceleration test apparatus in which the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhered to the surface of the test material, the interval between the droplets, and the salt concentration in the discharged salt water are controlled. Can be used to reproduce the state of salinity flying in the actual environment, as well as to reduce variations in the amount of salt adhesion due to the location of the test material. Can be improved.

図５は、本発明の他の実施例である大気腐食促進試験装置の構成図である。大気腐食促進試験装置は、温度と湿度が独立に制御でき、かつ、恒温恒湿槽内の温度と湿度の複数の組み合わせ条件を連続的に変化させて保持できる温湿度設定機能を有するプログラム制御可能な恒温恒湿槽１，塩分を付着させるために塩水を吐出するための塩水吐出機構２，塩水吐出機構を洗浄し保管する塩水吐出機構洗浄・保管室１２，被腐食試験体を保持するための被腐食試験体架台４から構成されており、図中では板状試験材５が架台上に設置されている。   FIG. 5 is a configuration diagram of an atmospheric corrosion acceleration test apparatus according to another embodiment of the present invention. The atmospheric corrosion acceleration test equipment can be controlled by temperature and humidity independently, and can be controlled by a program that has temperature and humidity settings that can maintain multiple combinations of temperature and humidity in a constant temperature and humidity chamber. Constant temperature and humidity chamber 1, salt water discharge mechanism 2 for discharging salt water to adhere salt, salt water discharge mechanism cleaning / storage chamber 12 for cleaning and storing the salt water discharge mechanism, for holding the specimen to be corroded It consists of a to-be-corroded test body gantry 4, and a plate-like test material 5 is installed on the gantry in the figure.

次に、この大気腐食促進試験装置における試験手順を示す。先ず、板状試験材を洗浄および乾燥させた後に、プログラム制御恒温恒湿槽内に設置された被腐食試験体架台の全面に並べる。腐食試験を開始する際、被腐食試験体架台に設置された板状試験材上部を塩水吐出機構が塩水を吐出しながら移動し、板状試験材の表面に所定量の塩水が付着される。塩水が付着した板状試験材は、恒温恒湿槽内で所定の温湿度が組み合わせられた温湿度サイクルの環境で腐食試験される。塩水吐出機構には、板状試験材を洗浄するための水洗用のノズルと送風ノズルが設置されており、板状試験材が所定の期間暴露された後の塩分洗浄と乾燥工程では、再び塩水吐出機構が被腐食試験体架台に設置された板状試験材上部を移動する。この時、塩水吐出機構から塩水は吐出しない状態で併設された水洗ノズルからから清浄な水が板状試験材に所定量放水されて、板状試験材に付着していた塩分が洗い流される。引き続き、塩水は吐出しない状態で併設された冷風送風ノズルから冷風が板状試験材に吹き付けられて板状試験材に付着している清浄水の液滴を除去する。次に、塩水吐出機構を塩水吐出機構洗浄・保管室に保管した後に、恒温恒湿槽を加湿しない４０℃一定温度で運転して板状試験材を乾燥させる。板状試験材が乾燥した後に再び、塩水吐出機構を移動させて塩分を付着させる。この一連の塩水付着，温湿度サイクルと洗浄乾燥工程を繰り返すことにより腐食試験を継続した。   Next, a test procedure in this atmospheric corrosion acceleration test apparatus will be shown. First, after a plate-shaped test material is washed and dried, it is arranged on the entire surface of a corrosion-resistant test specimen mount installed in a program-controlled constant temperature and humidity chamber. When the corrosion test is started, the salt water discharge mechanism moves while discharging salt water on the upper part of the plate-shaped test material installed on the corrosion test specimen mount, and a predetermined amount of salt water adheres to the surface of the plate-shaped test material. The plate-like test material to which salt water is adhered is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in a constant temperature and humidity chamber. The salt water discharge mechanism is provided with a water washing nozzle and an air blowing nozzle for washing the plate test material. In the salt washing and drying process after the plate test material has been exposed for a predetermined period of time, the salt water again The discharge mechanism moves on the upper part of the plate-shaped test material installed on the corrosion test specimen mount. At this time, a predetermined amount of clean water is discharged to the plate-shaped test material from a washing nozzle provided in a state where salt water is not discharged from the salt water discharge mechanism, and the salt attached to the plate-shaped test material is washed away. Subsequently, cold air is blown onto the plate-shaped test material from the cold air blowing nozzle provided in a state where salt water is not discharged, and the droplets of clean water adhering to the plate-shaped test material are removed. Next, after the salt water discharge mechanism is stored in the salt water discharge mechanism cleaning / storage chamber, the constant temperature and humidity chamber is operated at a constant temperature of 40 ° C. to dry the plate-like test material. After the plate-shaped test material is dried, the salt water discharge mechanism is moved again to deposit salt. The corrosion test was continued by repeating this series of salt water adhesion, temperature / humidity cycle and washing / drying process.

この一連の工程で、塩水吐出機構が塩水吐出機構洗浄・保管室に保管されている間に塩水から析出した塩分が固着し、以降の塩分付着工程における塩分付着精度のバラツキが大きくなる可能性がある。そこで、塩水吐出機構が保管されている間に、塩水吐出機構に併設されている給水口から清浄水を供給して塩水吐出口から吐出することにより塩水吐出機構内に残存している塩水を洗浄した。その結果、実施例１に示した塩分付着精度を維持して腐食試験が継続できた。   In this series of steps, salt deposited from the salt water adheres while the salt water discharge mechanism is stored in the salt water discharge mechanism cleaning / storage chamber, and there is a possibility that variations in the salt adhesion accuracy in the subsequent salt adhesion process will increase. is there. Therefore, while the salt water discharge mechanism is stored, clean water remaining in the salt water discharge mechanism is cleaned by supplying clean water from the water supply port provided in the salt water discharge mechanism and discharging it from the salt water discharge port. did. As a result, the corrosion test could be continued while maintaining the salt adhesion accuracy shown in Example 1.

上記実施例の大気腐食促進試験装置を用いることにより、実際の環境中で飛来する塩分状態を再現することができると同時に、試験材の設置位置による塩分付着量のバラツキを少なくすることができ、大気腐食促進試験の繰り返し再現性を向上することができる。   By using the atmospheric corrosion promotion test apparatus of the above embodiment, it is possible to reproduce the salinity state flying in the actual environment, and at the same time, it is possible to reduce the variation in the amount of salt adhesion due to the installation position of the test material, The repeatability of the atmospheric corrosion acceleration test can be improved.

図６は、本発明の他の実施例である大気腐食促進試験装置の構成図である。大気腐食促進試験装置は、温度と湿度が独立に制御でき、かつ、恒温恒湿槽内の温度と湿度の複数の組み合わせ条件を連続的に変化させて保持できる温湿度設定機能を有するプログラム制御可能な恒温恒湿槽１，塩分を付着させるために塩水を吐出するための塩水吐出機構２，塩水吐出機構を洗浄し保管する塩水吐出機構洗浄・保管室１２，被腐食試験体を保持するための可動式被腐食試験体架台１３，被腐食試験材を洗浄するための水洗槽１４から構成されている。   FIG. 6 is a configuration diagram of an atmospheric corrosion acceleration test apparatus according to another embodiment of the present invention. The atmospheric corrosion acceleration test equipment can be controlled by temperature and humidity independently, and can be controlled by a program that has temperature and humidity settings that can maintain multiple combinations of temperature and humidity in a constant temperature and humidity chamber. Constant temperature and humidity chamber 1, salt water discharge mechanism 2 for discharging salt water to adhere salt, salt water discharge mechanism cleaning / storage chamber 12 for cleaning and storing the salt water discharge mechanism, for holding the specimen to be corroded It consists of a movable corrosion test specimen base 13 and a water washing tank 14 for cleaning the corrosion test material.

次に、この大気腐食促進試験装置における試験手順を示す。先ず、板状試験材を洗浄および乾燥させた後に、プログラム制御恒温恒湿槽内に設置された可動式被腐食試験体架台の全面に並べる。腐食試験を開始する際、被腐食試験体架台に設置された板状試験材上部を塩水吐出機構が塩水を吐出しながら移動し、板状試験材の表面に所定量の塩水が付着される。塩水が付着した板状試験材は、恒温恒湿槽内で所定の温湿度が組み合わせられた温湿度サイクルの環境で腐食試験される。   Next, a test procedure in this atmospheric corrosion acceleration test apparatus will be shown. First, after a plate-shaped test material is washed and dried, it is arranged on the entire surface of a movable corrosion-resistant test specimen mount installed in a program-controlled constant temperature and humidity chamber. When the corrosion test is started, the salt water discharge mechanism moves while discharging salt water on the upper part of the plate-shaped test material installed on the corrosion test specimen mount, and a predetermined amount of salt water adheres to the surface of the plate-shaped test material. The plate-like test material to which salt water is adhered is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in a constant temperature and humidity chamber.

板状試験材が所定の期間暴露された後の塩分洗浄と乾燥工程では、可動式被腐食試験体架台ごと被腐食試験体が水洗槽に浸漬されて水洗槽内を循環していす清浄水により板状試験材に付着していた塩分が洗い流される。塩分が洗い流された後、可動式被腐食試験体架台は水洗槽から引き出された後、恒温恒湿槽を加湿しない５０℃一定温度で運転して板状試験材を乾燥させる。板状試験材が乾燥した後に再び、塩水吐出機構を移動させて塩分を付着させて、腐食試験を継続した。   In the salt washing and drying process after the plate-shaped test material has been exposed for a specified period of time, the corroded specimen is immersed in the washing tank together with the movable corrosion-resistant specimen mount, and the clean water circulating in the washing tank is used. The salt adhering to the plate test material is washed away. After the salt content has been washed away, the movable corrosion-resistant test specimen base is pulled out of the water washing tank, and then the constant temperature and humidity chamber is operated at a constant temperature of 50 ° C. to dry the plate-like test material. After the plate-shaped test material was dried, the salt water discharge mechanism was moved again to deposit salt, and the corrosion test was continued.

図７は本実施例における塩水吐出機構を示した図である。塩水吐出機構は、塩水を供給する塩水口６，吐出機構内の塩水を排出するための排水口７，塩水吐出機構内を洗浄する清浄水を供給する吸水口８の給排気口があり、塩水吐出機構内の塩水を塩水吐出口９の直上に設置されているピストン１０を駆動することにより、塩水吐出口から板状試験材に向けて塩水が吐出される。ここでは、吐出口が二列千鳥格子上に配置されている。この吐出口配列で吐出された塩水が液滴１１となり板状試験材に付着した状態を図８に示す。図３と比較すると板状試験材の面積に対する液滴の占める面積割合が多くなっていることがわかる。   FIG. 7 is a view showing a salt water discharge mechanism in the present embodiment. The salt water discharge mechanism has a salt water inlet 6 for supplying salt water, a drain outlet 7 for discharging salt water in the discharge mechanism, and a water intake / exhaust port 8 for supplying clean water for cleaning the salt water discharge mechanism. By driving the piston 10 installed immediately above the salt water discharge port 9 with salt water in the discharge mechanism, salt water is discharged from the salt water discharge port toward the plate-shaped test material. Here, the discharge ports are arranged on a two-row staggered pattern. FIG. 8 shows a state in which salt water discharged from the discharge port array becomes droplets 11 and adheres to the plate-shaped test material. Compared with FIG. 3, it can be seen that the ratio of the area occupied by the droplets to the area of the plate-shaped test material is increased.

実際に、塩水吐出口の直径とピストンの駆動条件を詳細に検討し、液滴直径を５０μｍに制御することを試みた結果、板状試験材に付着した塩水の直径を５０±５μｍ以内、すなわち、吐出機構の制御で設定した液滴直径（Ｒ）が板状試験材に実際に付着した液滴直径（ｒ）の１.１倍以内に制御できた。さらに、ピストンの駆動条件と被腐食試験体架台の移動速度の関係から、吐出した液滴が凝集せずに実際の環境に近い状態の塩分付着を再現するためには、液滴の間隔（Ｌ）が吐出機構の制御で設定した液滴直径（Ｒ）の１.２倍以上必要なことが判明した。以上から、実際の環境に近い状態で塩分を付着させる条件は、被腐食試験体表面に付着した塩水の液滴直径（ｒ）と塩水吐出機構で制御された液滴の直径（Ｒ）との関係がｒ≦１.１Ｒであり、かつ、被腐食試験体表面に付着した液滴の間隔（Ｌ）と塩水吐出機構で制御された液滴の直径との関係がＬ≧１.２Ｒ以上の等間隔で被腐食試験体表面に塩水を付着させることである。   Actually, the diameter of the salt water discharge port and the driving condition of the piston were examined in detail, and as a result of trying to control the droplet diameter to 50 μm, the diameter of the salt water adhering to the plate-like test material was within 50 ± 5 μm, that is, The droplet diameter (R) set by controlling the discharge mechanism could be controlled within 1.1 times the droplet diameter (r) actually attached to the plate-shaped test material. Furthermore, from the relationship between the driving conditions of the piston and the moving speed of the corrosion test specimen mount, in order to reproduce the adhesion of salt in a state close to the actual environment without agglomerating the discharged droplets, the interval between the droplets (L ) Is required to be 1.2 times or more the droplet diameter (R) set by controlling the discharge mechanism. From the above, the condition for depositing salt in a state close to the actual environment is that the salt water droplet diameter (r) adhering to the surface of the specimen to be corroded and the droplet diameter (R) controlled by the salt water discharge mechanism. The relationship is r ≦ 1.1R, and the relationship between the interval (L) between the droplets adhering to the surface of the specimen to be corroded and the diameter of the droplet controlled by the salt water discharge mechanism is L ≧ 1.2R or more. It is to make salt water adhere to the surface of the specimen to be corroded at regular intervals.

さらに、吐出させる塩水中の塩分濃度を制御することにより、板状試験材に付着する付着塩分量を制御できる範囲を検討した。図９は図８の付着形態において、塩分付着量と塩水液滴の直径あるいは液滴中の塩分濃度との関係を検討した図である。図４と同様に、塩分としてＮａＣｌを用い、０.００３５mass％から３５mass％まで変化させて塩付着量を検討した。この吐出口配列の方が、一列で吐出口を配置した図２の吐出口配列よりも付着塩分量の制御範囲が広くなり、実際の環境で飛来する塩分の付着量をより広範囲で再現できることが確認できた。   Furthermore, the range which can control the amount of adhesion salt adhering to a plate-shaped test material was examined by controlling the salt concentration in the salt water to discharge. FIG. 9 is a diagram in which the relationship between the amount of attached salt and the diameter of the salt water droplet or the concentration of salt in the droplet is examined in the attached form of FIG. Similarly to FIG. 4, NaCl was used as the salt content, and the salt adhesion amount was examined by changing from 0.0033 mass% to 35 mass%. This discharge port array has a wider control range of the amount of salt adhering than the discharge port array shown in FIG. 2 in which the discharge ports are arranged in a row, and the amount of salt adhering in the actual environment can be reproduced in a wider range. It could be confirmed.

さらに板状試験材の設置位置による塩分付着量のバラツキを調べたところ、試験材表面任意の１cm2の面において、試験材表面に付着した塩の質量（ｍ）と制御した塩分付着量（Ｍ）とが、ｍ≦１.１Ｍの関係で試験片表面に塩分が均一に付着することが確認できた。 It was further investigated Salt Adhesion of variations due to the installation position of the plate-shaped test material, with the surface of the test material surface any 1 cm 2, the mass (m) and control the salt coating weight of salt adhering to the test piece surface (M ), It was confirmed that the salt content uniformly adhered to the surface of the test piece in a relationship of m ≦ 1.1M.

上記実施例が示すように、塩水吐出機構から吐出し試験材表面に付着する塩水液滴の直径とその液滴の間隔、および、吐出する塩水中の塩分濃度が制御された大気腐食促進試験装置を用いることにより、実際の環境中で飛来する塩分状態をより広範囲に再現することができると同時に、試験材の設置位置による塩分付着量のバラツキを少なくすることができ、大気腐食促進試験の繰り返し再現性を向上することができる。   As shown in the above embodiment, the atmospheric corrosion acceleration test apparatus in which the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhered to the surface of the test material, the interval between the droplets, and the salt concentration in the discharged salt water are controlled. By using, it is possible to reproduce the salinity state flying in the actual environment over a wider range, and at the same time, it is possible to reduce variations in the amount of salt adhesion due to the installation position of the test material, and to repeat the atmospheric corrosion acceleration test Reproducibility can be improved.

図１０は、本発明の他の実施例である大気腐食促進試験装置の構成図である。大気腐食促進試験装置は、温度と湿度が独立に制御でき、かつ、恒温恒湿槽内の温度と湿度の複数の組み合わせ条件を設定する機能を有するプログラム制御可能な恒温恒湿槽１，塩分を付着させるために塩水を吐出するための塩水吐出機構２，塩水吐出機構を洗浄し保管する塩水吐出機構洗浄・保管室１２，被腐食試験体を保持するための可動式被腐食試験体架台１３，被腐食試験材を洗浄するための水洗槽１４から構成されている。   FIG. 10 is a configuration diagram of an atmospheric corrosion acceleration test apparatus according to another embodiment of the present invention. The atmospheric corrosion promotion test equipment can control the temperature and humidity independently, and has a function to set multiple conditions of temperature and humidity in the constant temperature and humidity chamber. A salt water discharge mechanism 2 for discharging salt water for adhering, a salt water discharge mechanism cleaning / storage chamber 12 for cleaning and storing the salt water discharge mechanism, a movable corrosion test specimen base 13 for holding the corrosion test specimen, It is comprised from the water-washing tank 14 for wash | cleaning a to-be-corroded test material.

次に、この大気腐食促進試験装置における試験手順を示す。先ず、板状試験材を洗浄および乾燥させた後に、被腐食試験体架台の全面に並べる。この試験材をプログラム制御恒温恒湿槽内に挿入して腐食試験を開始する際、被腐食試験体架台に設置された板状試験材が塩分洗浄・乾燥室内に設置された塩水吐出機構の下を通過する際に塩水吐出機構から、板状試験材に向けて塩水が吐出されることにより、板状試験材の表面に所定量の塩水が付着される。塩水が付着した板状試験材は、恒温恒湿槽内で所定の温湿度が組み合わせられた温湿度サイクルの環境で腐食試験される。乾燥と湿潤の組み合わせ環境に板状試験材を所定の期間暴露した。   Next, a test procedure in this atmospheric corrosion acceleration test apparatus will be shown. First, after the plate-shaped test material is washed and dried, it is arranged on the entire surface of the corrosion test specimen mount. When this test material is inserted into a program-controlled thermo-hygrostat and the corrosion test is started, the plate-like test material installed on the corrosion-resistant test object base is placed under the salt water discharge mechanism installed in the salt washing / drying chamber. When the salt water is discharged from the salt water discharge mechanism toward the plate-shaped test material when passing through the plate, a predetermined amount of salt water adheres to the surface of the plate-shaped test material. The plate-like test material to which salt water is adhered is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in a constant temperature and humidity chamber. The plate-like test material was exposed to a combination of dry and wet environments for a predetermined period.

板状試験材が所定の期間暴露された後の塩分洗浄と乾燥工程では、可動式被腐食試験体架台ごと被腐食試験体が水洗槽に浸漬されて水洗槽内を循環していす清浄水により板状試験材に付着していた塩分が洗い流される。塩分が洗い流された後、可動式被腐食試験体架台は水洗槽から引き出され、塩水吐出機構洗浄・保管室を通じて、取り出される。塩水吐出機構洗浄・保管室内には、温風乾燥ノズルが設置されており、温風乾燥ノズルから温風が板状試験材に吹き付けられて乾燥する。この一連の塩水付着，温湿度サイクルと洗浄乾燥工程を繰り返すことにより腐食試験を継続した。   In the salt washing and drying process after the plate-shaped test material has been exposed for a specified period of time, the corroded specimen is immersed in the washing tank together with the movable corrosion-resistant specimen mount, and the clean water circulating in the washing tank is used. The salt adhering to the plate test material is washed away. After the salt content is washed away, the movable corrosion-resistant specimen mount is withdrawn from the washing tank and taken out through the salt water discharge mechanism washing / storage room. A hot air drying nozzle is installed in the salt water discharge mechanism cleaning / storage chamber, and the hot air is blown from the hot air drying nozzle to the plate-like test material to be dried. The corrosion test was continued by repeating this series of salt water adhesion, temperature / humidity cycle and washing / drying process.

本実施例の大気腐食促進試験装置の性能を調べたところ、実施例３と同様に、実際の環境で飛来する塩分の付着状態を広範囲の付着量で再現できることが確認でき、塩分付着量のバラツキも、試験片表面任意の１cm2の面において、試験片表面に付着した塩の質量（ｍ）と制御した塩分付着量（Ｍ）とが、ｍ≦１.１Ｍの関係で試験片表面に塩分が均一に付着することを確認した。 As a result of examining the performance of the atmospheric corrosion acceleration test apparatus of this example, it was confirmed that the adhesion state of salt flying in the actual environment could be reproduced with a wide range of adhesion amount as in Example 3, and the dispersion of salt adhesion amount was uneven. In addition, on the surface of the test piece at an arbitrary 1 cm 2 surface, the mass of salt adhering to the surface of the test piece (m) and the controlled salt content (M) are in the relationship of m ≦ 1.1M. Was confirmed to adhere uniformly.

上記実施例が示すように、塩水吐出機構から吐出し試験材表面に付着する塩水液滴の直径とその液滴の間隔、および、吐出する塩水中の塩分濃度が制御された大気腐食促進試験装置を用いることにより、実際の環境中で飛来する塩分状態を再現することができると同時に、試験材の設置位置による塩分付着量のバラツキを少なくすることができ、大気腐食促進試験の繰り返し再現性を向上することができる。   As shown in the above embodiment, the atmospheric corrosion acceleration test apparatus in which the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhered to the surface of the test material, the interval between the droplets, and the salt concentration in the discharged salt water are controlled. Can be used to reproduce the state of salinity flying in the actual environment, as well as to reduce variations in the amount of salt adhesion due to the location of the test material. Can be improved.

本発明の一実施例である大気腐食促進試験装置の構成図。The block diagram of the atmospheric corrosion acceleration | stimulation test apparatus which is one Example of this invention. 本発明の一実施例である塩水吐出機構を示した図。The figure which showed the salt water discharge mechanism which is one Example of this invention. 吐出された塩水が液滴となり板状試験材に付着した状態を示す図。The figure which shows the state from which the discharged salt water became a droplet and adhered to the plate-shaped test material. 塩分付着量と塩水液滴の直径あるいは液滴中の塩分濃度との関係を示す図。The figure which shows the relationship between the amount of salt adhesion, the diameter of a salt water droplet, or the salt concentration in a droplet. 本発明の他の実施例である大気腐食促進試験装置の構成図。The block diagram of the atmospheric corrosion acceleration | stimulation test apparatus which is another Example of this invention. 本発明の他の実施例である大気腐食促進試験装置の構成図。The block diagram of the atmospheric corrosion acceleration | stimulation test apparatus which is another Example of this invention. 本発明の他の実施例である塩水吐出機構を示した図。The figure which showed the salt water discharge mechanism which is the other Example of this invention. 吐出された塩水が液滴となり板状試験材に付着した状態を示す他の実施例の図。The figure of the other Example which shows the state which the discharged salt water became a droplet and adhered to the plate-shaped test material. 塩分付着量と塩水液滴の直径あるいは液滴中の塩分濃度との関係を示す他の実施例の図。The figure of the other Example which shows the relationship between the salt content and the salt water droplet diameter or the salt concentration in the droplet. 本発明の他の実施例である大気腐食促進試験装置の構成図。The block diagram of the atmospheric corrosion acceleration | stimulation test apparatus which is another Example of this invention.

符号の説明Explanation of symbols

１ プログラム制御恒温恒湿槽
２ 塩水吐出機構
３ 塩分洗浄・乾燥室
４ 被腐食試験体架台
５ 板状試験材
６ 塩水口
７ 排水口
８ 吸水口
９ 塩水吐出口
１０ ピストン
１１ 塩水液滴
１２ 塩水吐出機構洗浄・保管室
１３ 可動式被腐食試験体架台
１４ 水洗槽 DESCRIPTION OF SYMBOLS 1 Program control constant temperature and humidity tank 2 Salt water discharge mechanism 3 Salt washing / drying chamber 4 Corrosion test body mount 5 Plate-shaped test material 6 Salt water port 7 Drain port 8 Water intake port 9 Salt water discharge port 10 Piston 11 Salt water droplet 12 Salt water discharge Mechanism cleaning / storage chamber 13 Movable corrosion test specimen base 14 Water washing tank

Claims (10)

恒温恒湿槽と、被腐食試験体を載せる被腐食試験体架台と、水洗洗浄機構と、被腐食試験体に塩水を噴霧する塩水吐出機構とから構成される大気腐食促進試験装置であって、
前記塩水吐出機構から吐出され、前記被腐食試験体表面に付着した塩水の液滴直径（ｒ）と塩水吐出機構で制御された液滴の直径（Ｒ）との関係がｒ≦１.１Ｒであり、かつ、被腐食試験体表面に付着した液滴の間隔（Ｌ）と塩水吐出機構で制御された液滴の直径との関係がＬ≧１.２Ｒ以上の間隔で被腐食試験体表面に単位面積あたり所定量の塩水を付着させることを特徴とする大気腐食促進試験装置。 An atmospheric corrosion acceleration test device comprising a thermo-hygrostat, a corrosion test specimen base on which a corrosion test specimen is placed, a washing and washing mechanism, and a salt water discharge mechanism for spraying salt water onto the corrosion test specimen,
The relationship between the droplet diameter (r) of salt water discharged from the salt water discharge mechanism and attached to the surface of the specimen to be corroded and the diameter (R) of the droplet controlled by the salt water discharge mechanism is r ≦ 1.1R. In addition, the relationship between the interval (L) between the droplets adhering to the surface of the specimen to be corroded and the diameter of the droplet controlled by the salt water discharge mechanism is at least L ≧ 1.2R on the surface of the specimen to be corroded. An atmospheric corrosion promotion test apparatus characterized by adhering a predetermined amount of salt water per unit area. 被腐食試験体表面に付着した塩水の液滴直径が１０〜３００μｍであり、かつ、被腐食試験体表面に付着した塩水が蒸発乾固して付着析出した塩の質量が０.１〜１００００mg／ｍ2であることを特徴とする請求項１に記載の大気腐食促進試験装置。 The droplet diameter of the salt water adhering to the surface of the corroded specimen is 10 to 300 μm, and the mass of the salt deposited and deposited by evaporation of the salt water adhering to the surface of the corroded specimen is 0.1 to 10,000 mg / The atmospheric corrosion acceleration test apparatus according to claim 1, wherein m 2 is m 2 . 被試験腐食体表面に塩を付着させるために用いる塩水吐出機構を走査することにより、被腐食試験体表面に塩水を付着させることを特徴とする請求項２記載の大気腐食促進試験装置。   3. The atmospheric corrosion acceleration test apparatus according to claim 2, wherein salt water is adhered to the surface of the test object to be corroded by scanning a salt water discharge mechanism used for adhering salt to the surface of the test object. 被腐食試験体を設置した架台を移動させることにより、被腐食試験体表面に塩水を付着させることを特徴とする請求項２記載の大気腐食促進試験装置。   3. The atmospheric corrosion acceleration test apparatus according to claim 2, wherein salt water is adhered to the surface of the corrosion test specimen by moving a base on which the test specimen is installed. 恒温恒湿槽，被腐食試験体架台，水洗洗浄槽，塩水吐出機構から構成され、塩水吐出機構から吐出され、可動式被腐食試験体架台とともに被試験体を水洗洗浄槽内に浸漬させることにより、被試験体表面に付着した塩を除去して乾燥した後に、被腐食試験体表面に塩を付着させ、ここで、被腐食試験体表面に付着した塩水の液滴直径（ｒ）と塩水吐出機構で制御された液滴の直径（Ｒ）との関係がｒ≦１.１Ｒであり、かつ、被腐食試験体表面に付着した液滴の間隔（Ｌ）と塩水吐出機構で制御された液滴の直径との関係がＬ≧１.２Ｒ以上の間隔で被腐食試験体表面に塩水を付着させることを特徴とする大気腐食促進試験装置。   Consists of a constant temperature and humidity chamber, a corrosion test specimen base, a water washing and washing tank, and a salt water discharge mechanism. By discharging from the salt water discharge mechanism, the test specimen is immersed in the water washing and washing tank together with the movable corrosion test specimen base. After removing the salt adhering to the surface of the test object and drying, the salt is adhered to the surface of the test object, and the droplet diameter (r) of the salt water adhering to the surface of the test object and the salt water discharge The relationship between the droplet diameter (R) controlled by the mechanism is r ≦ 1.1R, and the interval (L) between the droplets adhering to the surface of the specimen to be corroded and the liquid controlled by the salt water discharge mechanism An atmospheric corrosion accelerating test apparatus characterized in that salt water adheres to the surface of a specimen to be corroded at intervals of L ≧ 1.2R in relation to the diameter of the droplets. 被腐食試験体表面に付着した塩水の液滴直径が１０〜３００μｍであり、かつ、被腐食試験体表面に付着した塩水が蒸発乾固して付着析出した塩の質量が０.１〜１００００mg／ｍ2であることを特徴とする請求項５に記載の大気腐食促進試験装置。 The droplet diameter of the salt water adhering to the surface of the corroded specimen is 10 to 300 μm, and the mass of the salt deposited and deposited by evaporation of the salt water adhering to the surface of the corroded specimen is 0.1 to 10,000 mg / The atmospheric corrosion acceleration test apparatus according to claim 5, wherein m 2 is m 2 . 被試験腐食体表面に塩を付着させるために用いる塩水吐出機構を走査することにより、被腐食試験体表面に塩水を付着させることを特徴とする請求項６記載の大気腐食促進試験装置。   7. The atmospheric corrosion acceleration test apparatus according to claim 6, wherein the salt water is adhered to the surface of the test object to be corroded by scanning a salt water discharge mechanism used for adhering salt to the surface of the test object. 被腐食試験体を設置した架台を移動させることにより、被腐食試験体表面に塩水を付着させることを特徴とする請求項６記載の大気腐食促進試験装置。   The atmospheric corrosion acceleration test apparatus according to claim 6, wherein salt water is attached to the surface of the corrosion test specimen by moving a base on which the test specimen is installed. 塩水吐出機構に洗浄水導入口および塩水導入口を具備し、塩水の吐出後に洗浄水を吐出することを特徴とする請求項１乃至９に記載の大気腐食促進試験装置。   10. The atmospheric corrosion promotion test apparatus according to claim 1, wherein the salt water discharge mechanism includes a cleaning water inlet and a salt water inlet, and the cleaning water is discharged after the salt water is discharged. 恒温恒湿槽，被腐食試験体架台，水洗洗浄機構，塩分機構から構成され、塩分付着機構から被腐食試験体表面に付着した塩の質量（ｍ）が、試験体表面任意の１cm2の面で、塩分付着機構で制御された塩の質量（Ｍ）とが、ｍ≦１.１Ｍの関係で被腐食試験体表面に均一に付着させることを特徴とする大気腐食促進試験装置。 It is composed of a constant temperature and humidity chamber, a corrosion test specimen base, a washing and washing mechanism, and a salinity mechanism. The surface of the test specimen surface is 1 cm 2 where the mass (m) of salt adhering to the surface of the corrosion test specimen from the salt adhesion mechanism is And an atmospheric corrosion acceleration test apparatus characterized in that the mass (M) of the salt controlled by the salt adhesion mechanism is uniformly adhered to the surface of the corrosion test specimen in a relationship of m ≦ 1.1M.
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JP2016126011A (en) * 2014-12-26 2016-07-11 新日鐵住金株式会社 Corrosion resistance evaluation method of electromagnetic steel sheet
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