JPS6051657B2 - Corrosion resistance test method - Google Patents
Corrosion resistance test methodInfo
- Publication number
- JPS6051657B2 JPS6051657B2 JP15651179A JP15651179A JPS6051657B2 JP S6051657 B2 JPS6051657 B2 JP S6051657B2 JP 15651179 A JP15651179 A JP 15651179A JP 15651179 A JP15651179 A JP 15651179A JP S6051657 B2 JPS6051657 B2 JP S6051657B2
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- test
- soluble salts
- water
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
【発明の詳細な説明】
この発明は、金属材料の耐食性試験を行なうための改良
法に関するものてある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for testing the corrosion resistance of metal materials.
金属材料の大気中における耐食性を知るための腐食促進
試験法としては、塩水噴霧試験、ガス腐食試験等が知ら
れている。Salt spray tests, gas corrosion tests, etc. are known as corrosion acceleration test methods for determining the corrosion resistance of metal materials in the atmosphere.
これらの方法は、腐食環境条件を一定にして腐食試験を
行なうもので、金属材料間の耐食性の比較、あるいは表
面処理等の防食性能の比較を行なう場合に適する。とこ
ろで、金属材料の耐食性に及ぼす腐食環境条件の影響を
知るためには、腐食環境条件を種々変えて試験を行なう
必要があるが、従来の方法では、腐食環境条件ごとの試
験が必要であるため多大の労力を要した。These methods perform corrosion tests under constant corrosive environmental conditions, and are suitable for comparing the corrosion resistance of metal materials or the corrosion prevention performance of surface treatments, etc. By the way, in order to understand the influence of corrosive environmental conditions on the corrosion resistance of metal materials, it is necessary to conduct tests under various corrosive environmental conditions, but with conventional methods, tests are required for each corrosive environmental condition. It took a lot of effort.
この発明は上記のような従来法における欠点が解消され
た試験法を提供するものて、従来法とは異なり、表面に
水溶性塩類及び労力粒子を付着させた試験片を用い、そ
の試験片を試験槽内で乾湿繰り返しを行なうことによつ
て腐食を促進させるものである。The present invention provides a test method that eliminates the drawbacks of the conventional methods as described above. Corrosion is accelerated by repeatedly drying and moistening in a test chamber.
この場合、腐食環境条件の影響を求めるために、水溶性
塩類の成分及び付着量を任意に設定することができる。
すなわち、この発明によれば、腐食環境条件は水溶性塩
類の成分及び付着量によつて制御でき、かつ労力粒子を
共存させることにより大気中の塵埃等が付着することに
よる隙間腐食を再現できるという特徴を有する耐食性試
験方法が提供される。In this case, in order to determine the influence of corrosive environmental conditions, the components and adhesion amount of water-soluble salts can be arbitrarily set.
In other words, according to this invention, the corrosive environment conditions can be controlled by the composition and amount of water-soluble salts attached, and by coexisting labor particles, crevice corrosion caused by adhesion of atmospheric dust, etc. can be reproduced. A corrosion resistance testing method having characteristics is provided.
この発明の試験法によれば、従来法とは異なり、種々の
腐食環境条件の試験結果が一度に得られるため、金属材
料間の耐食性の比較、あるいは、表面処理等の比較ばか
りてなく、金属材料の耐食性が腐食環境によつてどのよ
うに変化するか’に関する知見が得られるという利点が
ある。According to the test method of this invention, unlike conventional methods, test results under various corrosive environment conditions can be obtained at once, so it is not only possible to compare the corrosion resistance between metal materials or surface treatments, but also to compare the corrosion resistance of metal materials. This method has the advantage of providing insight into how the corrosion resistance of materials changes depending on the corrosive environment.
この発明の方法を実施するには、まず、試験片表面にＯ
リング等を治具で固定し、ｏリングの内側の試験片表面
上に労力粒子を均一に分散させた後、所定の濃度に調製
した水溶性塩類の水溶液を、添加する。この場合、労力
粒子としては、金属酸化物、力ーボン、ガラス球等が単
独あるいは混合して用いられる。To carry out the method of this invention, first, O2 is applied to the surface of the test piece.
After fixing the ring etc. with a jig and uniformly dispersing the labor particles on the surface of the test piece inside the O-ring, an aqueous solution of water-soluble salts prepared to a predetermined concentration is added. In this case, as the labor particles, metal oxides, carbon atoms, glass spheres, etc. are used alone or in combination.
また、水溶性塩類としては、塩化物、硫酸塩、硝酸塩等
が、単独あるいは混合して用いられる。固型粒子及び水
溶性塩類の付着量は広範囲に変化させることができ、固
型粒子は０〜５００ｍ９１ｄ１水溶性塩類は０〜５０ｍ
９１ｃ１ｔ程度がよい。次に、固型粒子及び水溶性塩類
を付着させた試験片は、湿度を変えることのできる試験
槽内に保持し、乾湿繰り返し試験を行なうことにより、
自然条件下の腐食の進行に極めて近い方法で腐食を進行
させることができる。次にこの発明を実施例により詳細
に説明する。Further, as the water-soluble salts, chlorides, sulfates, nitrates, etc. may be used alone or in combination. The adhesion amount of solid particles and water-soluble salts can be varied over a wide range, with solid particles ranging from 0 to 500 m91d1 water-soluble salts from 0 to 50 m.
Approximately 91c1t is good. Next, the test piece to which the solid particles and water-soluble salts were attached was kept in a test chamber where the humidity could be changed, and repeated dry-wet tests were carried out.
Corrosion can progress in a manner that closely resembles the progress of corrosion under natural conditions. Next, the present invention will be explained in detail with reference to examples.
実施例固型粒子としてガラス球（イ）．３Ｔ１ｒＪｎφ
）を、また、水溶性塩類としてＮａＣｌ及びＮａ２ｓＯ
４を用い、溶融亜鉛メッキ鋼板（３０Ｔｍ×３ｈ）の耐
食性試験を行なつた。Example: Glass spheres (a) as solid particles. 3T1rJnφ
), and also NaCl and Na2sO as water-soluble salts.
A corrosion resistance test was conducted on a hot-dip galvanized steel plate (30Tm x 3h) using No. 4.
この場合、０リングとしては、内径２２Ｔｆ＄Ｌφのテ
フロン製の０リングを用い、アクリル樹脂製の試験治具
により、試験片の中央部に固定した。In this case, a Teflon O-ring with an inner diameter of 22Tf$Lφ was used as the O-ring, and was fixed to the center of the test piece using a test jig made of acrylic resin.
試験槽は、温度調節機構及び除湿機構を備え、かつ試験
片保持台を内蔵する内容積約２５０′のものを用いた。
なお、この試験を行なうに際しての試験条件は次に示す
通りである。The test chamber used had an inner volume of about 250' and was equipped with a temperature control mechanism and a dehumidification mechanism, and also had a built-in test piece holding stand.
The test conditions for conducting this test are as follows.
固型粒子付着条件：ガラス球（イ）．３７ｒ０ｆｔφ）
２６０ｍ９１ｄ水溶性塩類付着条件：Ａ：無添加、Ｂ：
ＮａＣｌｌｍ９ｌｃＴｌ．．Ｃ：ＮａＣＩ５ｍ９ｌＣＩ
ＮＤ：ＮａＣｌｌＯｍ９ｌｄ．．Ｅ：Ｎａ２ＳＯ４ｌｍ
９ｌｄｌＦ：Ｎａ２ＳＯ４５ｍ９ｌＣｄｌＧ：Ｎａ２Ｓ
Ｏ４ｌＯｍｇＩｄｌＨ：ＮａＣｌ＋Ｎａ２ＳＯ４各５ｍ
９１ｃＩｔ試験槽内温度・湿度条件：温度：６０℃一定
、湿度：３０％ＲＨ６ｈｒ−９８％ＲＨ６ｌｌｒこの試
験の結果得られる試験片の腐食状態は、水溶性塩類の付
着条件によつて変化しており、大気腐食に及ぼす腐食環
境条件の影響を定量的に比較検討することができた。Solid particle adhesion conditions: Glass bulb (a). 37r0ftφ)
260m91d Water-soluble salts adhesion conditions: A: No additive, B:
NaCllm9lcTl. ．． C: NaCI5m9lCI
ND: NaCllOm9ld. ．． E: Na2SO4lm
9ldlF:Na2SO45m9lCdlG:Na2S
O4lOmgIdlH: NaCl+Na2SO4 each 5m
91cIt test chamber temperature/humidity conditions: Temperature: 60℃ constant, humidity: 30%RH6hr-98%RH6llr The corrosion state of the test piece obtained as a result of this test changes depending on the adhesion conditions of water-soluble salts. , we were able to quantitatively and comparatively examine the effects of corrosive environmental conditions on atmospheric corrosion.
この発明の試験法により得られた結果を次表に示す。The results obtained by the test method of this invention are shown in the following table.
Claims (1)
せ、上記水溶性塩類の成分と付着量を変化させることに
より、腐食環境条件を制御するようにしたことを特徴と
する耐食性試験方法。 ２ 試験片を乾燥、湿潤による湿度の繰り返しおよびそ
れに伴う高温、低温の温度変化を相乗させたことを特徴
とする特許請求の範囲第１項記載の耐食性試験方法。 ３ 固型粒子としてガラス球を用いたことを特徴とする
特許請求の範囲第１項又は第２項記載の耐食性試験方法
。[Claims] 1. Corrosive environmental conditions are controlled by attaching water-soluble salts and solid particles to the surface of the test piece and changing the composition and amount of the water-soluble salts attached. Corrosion resistance test method. 2. The corrosion resistance testing method according to claim 1, characterized in that the test piece is repeatedly exposed to humidity by drying and wetting, and the accompanying temperature changes between high and low temperatures are synergized. 3. The corrosion resistance testing method according to claim 1 or 2, characterized in that glass spheres are used as the solid particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15651179A JPS6051657B2 (en) | 1979-11-30 | 1979-11-30 | Corrosion resistance test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15651179A JPS6051657B2 (en) | 1979-11-30 | 1979-11-30 | Corrosion resistance test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5679237A JPS5679237A (en) | 1981-06-29 |
| JPS6051657B2 true JPS6051657B2 (en) | 1985-11-15 |
Family
ID=15629362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15651179A Expired JPS6051657B2 (en) | 1979-11-30 | 1979-11-30 | Corrosion resistance test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051657B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011064678A (en) * | 2009-08-19 | 2011-03-31 | Jfe Steel Corp | Vessel ballast tank corrosion testing method |
| JP5831011B2 (en) * | 2011-07-27 | 2015-12-09 | Ｊｆｅスチール株式会社 | Corrosion test method of corrosion resistant steel for cargo ship and coal ballast hold |
-
1979
- 1979-11-30 JP JP15651179A patent/JPS6051657B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5679237A (en) | 1981-06-29 |
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