JP3097791B2 - Evaluation method of corrosion resistance of metal materials - Google Patents
Evaluation method of corrosion resistance of metal materialsInfo
- Publication number
- JP3097791B2 JP3097791B2 JP05059848A JP5984893A JP3097791B2 JP 3097791 B2 JP3097791 B2 JP 3097791B2 JP 05059848 A JP05059848 A JP 05059848A JP 5984893 A JP5984893 A JP 5984893A JP 3097791 B2 JP3097791 B2 JP 3097791B2
- Authority
- JP
- Japan
- Prior art keywords
- metal material
- corrosion resistance
- corrosion
- cleaning solution
- test
- 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 - Fee Related
Links
- 238000005260 corrosion Methods 0.000 title claims description 69
- 230000007797 corrosion Effects 0.000 title claims description 69
- 239000007769 metal material Substances 0.000 title claims description 39
- 238000011156 evaluation Methods 0.000 title description 21
- 238000004140 cleaning Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
- 238000010828 elution Methods 0.000 claims description 18
- 239000000470 constituent Substances 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 150000002500 ions Chemical class 0.000 claims description 9
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 9
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 8
- 239000012498 ultrapure water Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004255 ion exchange chromatography Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 31
- 230000004580 weight loss Effects 0.000 description 11
- 238000005406 washing Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、腐食性ガス又は腐食性
溶液に対する金属材の耐食性の評価方法に関するもので
あり、配管材や制御弁等の金属材の耐食性の評価に利用
されるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for evaluating the corrosion resistance of a metal material to a corrosive gas or a corrosive solution, and is used for evaluating the corrosion resistance of a metal material such as a piping material and a control valve. is there.
【０００２】[0002]
【従来の技術】金属材等の耐食性試験としては、腐食性
溶液を用いる浸漬腐食試験や接液腐食試験、腐食性ガス
を用いる接ガス腐食試験等が存在する。2. Description of the Related Art As corrosion resistance tests for metal materials and the like, there are an immersion corrosion test using a corrosive solution, a liquid contact test, and a gas contact test using a corrosive gas.
【０００３】また、前記腐食試験により得られた耐食性
の評価方法としては、前者の浸漬腐食試験等ではテスト
用金属材の腐食減量を測定する方法が、後者の接ガス腐
食試験等では目視による表面観察法が、夫々広く利用さ
れている。As a method of evaluating the corrosion resistance obtained by the corrosion test, a method of measuring the weight loss of a test metal material in the former immersion corrosion test and the like, and a method of visually observing the surface in a gas contact corrosion test and the like of the latter. Observation methods are widely used, respectively.
【０００４】ところで、前記腐食減量を測定する耐食性
評価法は、定量的な測定値を基礎とする評価であるた
め、評価の数値的な表示が簡単且つ正確にでき、優れた
実用的効用を有するものである。[0004] Incidentally, since the corrosion resistance evaluation method for measuring the corrosion weight loss is an evaluation based on a quantitative measurement value, the numerical display of the evaluation can be easily and accurately displayed, and has excellent practical utility. Things.
【０００５】しかし、当該腐食減量の測定には高精度な
びょう秤量計器が必要になるうえ、相当長期に亘って腐
食試験を継続しなければ腐食減量が明確に把握し難いと
云う難点がある。即ち、耐食性に優れた金属材の場合に
は、腐食生成物の形成量が少ないため必然的に腐食によ
る減量が少なく、その結果減量の秤量が著しく困難とな
る。また逆に、腐食減量を増すことにより秤量を容易に
しようとすると、試験時間が長期になると云う問題があ
る。[0005] However, the measurement of the corrosion weight loss requires a high-accuracy weighing instrument, and it is difficult to clearly understand the corrosion weight loss unless a corrosion test is continued for a considerably long period of time. That is, in the case of a metal material having excellent corrosion resistance, the amount of formed corrosion products is small, so that the weight loss due to corrosion is inevitably small, and as a result, weighing of the weight loss becomes extremely difficult. Conversely, if the weighing is facilitated by increasing the corrosion weight loss, there is a problem that the test time becomes long.
【０００６】これに対して、後者の目視による表面観察
法は比較的簡単に実施できるうえ、腐食減量を測定する
場合に比較して試験時間も相対的に短くてよく、実用上
は極めて便宜な方法である。On the other hand, the latter method of observing the surface by visual observation can be carried out relatively easily, and the test time may be relatively short as compared with the case of measuring corrosion weight loss, which is extremely convenient in practical use. Is the way.
【０００７】しかし、評価が所謂人間の感覚的判断を基
準として行われるため、客観性に著しく欠け、評価の正
確な数値化が出来ないと云う問題がある。However, since the evaluation is performed on the basis of what is called a human sensory judgment, there is a problem that the objectivity is remarkably lacking and that the evaluation cannot be accurately quantified.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、従前の金属
材の耐食性評価方法に於ける上述の如き問題、即ち腐
食減量を測定する方法では、金属材料の種類によっては
相当長期の試験を必要とすることになり、評価に時間が
かかり過ぎること、外観観察法では、主観によって評
価が変わり、評価の正確な数値化ができないこと等の問
題を解決せんとするものであり、耐食性評価を長時間を
要することはなく、比較的迅速に、しかも正確に数値表
示できるようにした金属材の耐食性評価方法を提供する
ものである。SUMMARY OF THE INVENTION According to the present invention, the above-mentioned problem in the conventional method for evaluating the corrosion resistance of metal materials, that is, the method for measuring corrosion weight loss requires a considerably long test depending on the type of metal material. This is to solve the problems that the evaluation takes too much time and the appearance observation method changes the evaluation depending on the subjectivity and makes it impossible to quantify the evaluation accurately. It is an object of the present invention to provide a method for evaluating the corrosion resistance of a metal material which can display numerical values relatively quickly and accurately without requiring time.
【０００９】[0009]
【課題を解決するための手段】本件発明は、所定の時間
腐食性溶液若しくは腐食性ガスと接触せしめた金属材を
超純水から成る洗浄液中で超音波洗浄をし、その後腐食
生成物を含む前記洗浄液を原子吸光分析して洗浄液内へ
の金属材の各構成元素の溶出量を測定し、当該溶出量の
測定値を基準として耐食性を評価することを発明の基本
構成とするものである。According to the present invention, a metal material which has been brought into contact with a corrosive solution or a corrosive gas for a predetermined time is subjected to ultrasonic cleaning in a cleaning liquid composed of ultrapure water, and thereafter contains a corrosion product. The basic configuration of the present invention is to measure the elution amount of each constituent element of the metal material into the cleaning solution by atomic absorption analysis of the cleaning solution and evaluate the corrosion resistance based on the measured value of the elution amount.
【００１０】[0010]
【作用】腐食性溶液や腐食性ガスとの接触により、金属
材の外表面に腐食生成物が形成される。当該腐食生成物
は超純水中に於ける洗浄により金属材の外表面から剥離
され、洗浄液中へ溶出する。洗浄液中へ溶出した腐食生
成物の構成元素の溶出量は、原子吸光分析計により定量
測定され、記録表示される。金属材料の耐食性は、前記
構成元素の溶出量を金属材料の外表面積や腐食性ガス等
との接触時間等に基づいて適宜に補正されると共に、こ
の補正された数値によって耐食性の評価が表示される。The corrosion product is formed on the outer surface of the metal material by contact with the corrosive solution or corrosive gas. The corrosion product is separated from the outer surface of the metal material by washing in ultrapure water and elutes into the washing solution. The elution amount of the constituent elements of the corrosion product eluted into the cleaning solution is quantitatively measured by an atomic absorption spectrometer and recorded and displayed. Corrosion resistance of the metal material is appropriately corrected based on the elution amount of the constituent elements and the contact time with the outer surface area and the corrosive gas of the metal material, and the corrosion resistance evaluation is displayed by the corrected numerical value. You.
【００１１】[0011]
【実施例】以下、図面に基づいて本発明の実施例を説明
する。図１は、本発明の第１実施例に係る耐食性評価方
法の実施工程図であり、図に於いて、１は腐食生成物形
成工程、２は超音波洗浄工程、３は洗浄液の原子吸光分
析工程、４は評価工程である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a process diagram of a method for evaluating corrosion resistance according to a first embodiment of the present invention, in which 1 is a corrosion product forming process, 2 is an ultrasonic cleaning process, and 3 is an atomic absorption analysis of a cleaning solution. Step 4 is an evaluation step.
【００１２】前記腐食生成物形成工程１では、一定時間
試験用金属材Ａに腐食性ガス（例えばＨＣｌガス等）や
腐食性溶液を接触させるか、又は一定時間試験用金属材
Ａを腐食性溶液内へ浸漬することにより、その外表面上
に腐食生成物を形成させる。In the corrosion product forming step 1, a corrosive gas (for example, HCl gas) or a corrosive solution is brought into contact with the test metal material A for a certain period of time, or the test metal material A is brought into contact with the corrosive solution for a certain period of time. Immersion causes the formation of corrosion products on its outer surface.
【００１３】前記腐食生成物を形成せしめた試験用金属
材Ａは、引き続き超音波洗浄工程２へ送られ、ここで、
超純水Ｂを洗浄液として公知の超音波洗浄装置によって
一定時間洗浄される。当該超音波洗浄により、金属材Ａ
の外表面に形成された腐食生成物が剥離脱落すると共
に、洗浄液中へ腐食生成物が溶出する。The test metal material A on which the corrosion products have been formed is subsequently sent to an ultrasonic cleaning step 2, where
Cleaning is performed for a certain period of time by a known ultrasonic cleaning apparatus using ultrapure water B as a cleaning liquid. By the ultrasonic cleaning, the metal material A
The corrosion products formed on the outer surface of the substrate are peeled off, and the corrosion products are eluted into the cleaning solution.
【００１４】洗浄により、腐食生成物が溶出した洗浄液
は、引き続き原子吸光分析工程３へ送られ、ここで公知
の原子吸光光度計を用いて溶出物の分析が行われる。即
ち、洗浄液中へ溶出した腐食生成物の各構成元素、即ち
試験用金属材Ａの含有成分元素の溶出量が夫々自動的に
検出される。The washing solution from which the corrosion products have been eluted by the washing is subsequently sent to the atomic absorption analysis step 3, where the elute is analyzed using a known atomic absorption spectrophotometer. That is, the amount of each of the constituent elements of the corrosion product eluted into the cleaning liquid, that is, the amount of the constituent element contained in the test metal material A is automatically detected.
【００１５】前記原子吸光分析による溶出量の検出値は
引き続き評価工程４へ送られ、ここで試験用金属材Ａの
外表面積、腐食性ガス等の種類及び濃度、腐食性ガス等
との接触時間、洗浄工程２に於ける洗浄時間等に基づい
て、前記溶出量の検出値を所定の予かじめ条件下の値に
自動的に補正し、耐食性評価を示す数値を算出、表示す
る。尚、腐食性ガスの種類や濃度、接触時間、洗浄時間
等が、予かじめ定めた規定値通りであれば、前記補正工
程は単に金属材Ａの外表面積の大・小による補正のみと
なる。The detected value of the elution amount by the atomic absorption spectrometry is sent to the evaluation step 4 where the outer surface area of the test metal material A, the type and concentration of the corrosive gas, etc., and the contact time with the corrosive gas, etc. Based on the washing time in the washing step 2 and the like, the detected value of the elution amount is automatically corrected to a value under predetermined conditions, and a numerical value indicating the corrosion resistance evaluation is calculated and displayed. If the type and concentration of the corrosive gas, the contact time, the cleaning time, and the like are in accordance with the predetermined values, the correction process is simply a correction based on the size of the outer surface area of the metal material A. .
【００１６】図２は、本件発明の他の実施例に係る耐食
性評価方法の実施工程図である。本実施例と図１の実施
例とは、（イ）金属材ＡにＨＣｌ等の腐食性ガスを接触
させている点、（ロ）腐食生成物を溶出した洗浄液の一
部をイオンクロマト分析工程５へ送り、ここで洗浄液内
の腐食性ガスＣの構成元素のイオン量（例えばＣｌイオ
ン量）を測定する点及び（ハ）イオンクロマト分析工程
５からのイオン含有量の検出値を評価工程４へ送り、イ
オン含有量と前記金属材Ａの構成元素の溶出量とから耐
食性の評価値を決定する点、の３点に於いて相違を有し
ている。尚、前記（イ）、（ロ）、及び（ハ）以外の工
程は、第１実施例の場合と全く同一である。FIG. 2 is a process diagram of an embodiment of a method for evaluating corrosion resistance according to another embodiment of the present invention. This embodiment differs from the embodiment of FIG. 1 in that (a) a corrosive gas such as HCl is brought into contact with the metal material A, and (b) a part of the cleaning solution eluted with the corrosion product is subjected to an ion chromatography analysis step. 5, where the ion amount (eg, Cl ion amount) of the constituent element of the corrosive gas C in the cleaning liquid is measured and (c) the ion content detection value from the ion chromatographic analysis step 5 is evaluated. And the evaluation value of corrosion resistance is determined from the ion content and the elution amount of the constituent element of the metal material A. Steps other than (a), (b) and (c) are exactly the same as those in the first embodiment.
【００１７】[0017]
【表１】 [Table 1]
【００１８】表１は、図２に示した耐食性評価方法によ
る耐食性評価の一例を示すものである。当該試験では、
試験用金属材Ａとして、長さ１００ｍｍ（内径約１４．
５ｍｍφ）のＳＵＳ３１６Ｌ製パイプ（溶接部の無いも
の）と、長さ５０ｍｍ（内径約１４．５ｍｍφ）ＳＵＳ
３１６Ｌ製パイプを２本接続したもの（溶接部１箇所、
長さ１００ｍｍ）とが、夫々使用されている。また、腐
食性ガスＣとしてはＨＣｌガス（濃度約２０ＶＯＬ％）
が使用されており、当該ＨＣｌガスを試験用パイプＡ内
へ圧力約０．１ｋｇ／ｃｍ2 で充填したあと、約１０日
間密封状態で放置し、パイプＡの内壁面に腐食生成物を
形成せしめたものである。Table 1 shows an example of the corrosion resistance evaluation by the corrosion resistance evaluation method shown in FIG. In the test,
As the test metal material A, a length of 100 mm (inner diameter of about 14.
5mmφ) SUS316L pipe (with no weld) and 50mm length (inner diameter about 14.5mmφ) SUS
Two 316L pipes connected (one weld,
(Length 100 mm) is used respectively. As the corrosive gas C, HCl gas (concentration: about 20 VOL%)
After the HCl gas is filled into the test pipe A at a pressure of about 0.1 kg / cm 2 , it is left in a sealed state for about 10 days to form a corrosion product on the inner wall surface of the pipe A. It is a thing.
【００１９】その後、試験用パイプＡの両端を開放して
ＨＣｌガスを排出したあと、１０ｍｌの超純水を充填し
た試験管内へ前記試験用パイプＡを入れ、約１０分間超
音波洗浄を行った。Thereafter, both ends of the test pipe A were opened and HCl gas was discharged. Then, the test pipe A was put into a test tube filled with 10 ml of ultrapure water, and ultrasonic cleaning was performed for about 10 minutes. .
【００２０】洗浄を終えると、前記試験管内の洗浄水の
含有成分を原子吸光光度計を用いて分析し、Ｆｅ，Ｃ
ｒ，Ｎｉ，Ｍｏ，Ｓｉ，Ｍｎ，Ｃａの溶出量を測定し
た。また、これと並列的に、イオンクロマトグラフィー
を用いて前記試験管の洗浄水のＣｌイオン量を測定し
た。When the washing is completed, the components contained in the washing water in the test tube are analyzed using an atomic absorption spectrometer, and Fe, C
The elution amounts of r, Ni, Mo, Si, Mn, and Ca were measured. In parallel with this, the amount of Cl ions in the washing water of the test tube was measured using ion chromatography.
【００２１】尚、表１の測定結果からも明らかなよう
に、ステンレス等の腐食の評価にはＣｌとＦｅとＣｒと
ＮｉとＭｎの溶出量を調査すれば十分である。As is clear from the measurement results in Table 1, it is sufficient to evaluate the corrosion of stainless steel or the like by examining the elution amounts of Cl, Fe, Cr, Ni, and Mn.
【００２２】また、本発明では、各試験用金属材Ａを同
一外形寸法とし、且つ試験条件（腐食性ガスとの接触時
間や洗浄条件）を同一としているため、測定値の補正を
行わずに分析値をそのまま耐食性の評価値とし、各数値
が低いほど耐食性が高いと評価している。Further, in the present invention, since the test metal materials A have the same external dimensions and the same test conditions (contact time with the corrosive gas and cleaning conditions), the measured values are not corrected. The analysis value is directly used as the evaluation value of the corrosion resistance, and the lower the numerical value, the higher the corrosion resistance.
【００２３】[0023]
【発明の効果】本発明においては、外表面に腐食生成物
を形成せしめた試験用金属材Ａを超純水中で超音波洗浄
し、腐食生成物を溶出せしめた洗浄水を原子吸光分析
（若しくは原子吸光分析とイオンクロマト分析）するこ
とにより、金属材Ａの構成元素の溶出量（又は構成元素
の溶出量と腐食性ガスの構成元素のイオン量）を測定
し、当該測定値から金属材Ａの耐食性を数量的に評価す
る構成としている。その結果、試験用金属材Ａの外表面
に形成された腐食生成物が極く少量の場合であっても、
洗浄液内への溶出量を比較的正確に且つ迅速に測定する
ことが可能となり、従前の腐食減量を計測する場合に比
較して、より短時間内にしかも正確に耐食性を評価する
ことができる。According to the present invention, the test metal material A having a corrosion product formed on the outer surface is ultrasonically cleaned in ultrapure water, and the washing water from which the corrosion product has been eluted is subjected to atomic absorption analysis ( Or the atomic absorption analysis and ion chromatography analysis) to measure the elution amount of the constituent element of the metal material A (or the elution amount of the constituent element and the ion amount of the constituent element of the corrosive gas), and determine the metal material from the measured value. A is configured to quantitatively evaluate the corrosion resistance of A. As a result, even if the corrosion products formed on the outer surface of the test metal material A are extremely small,
The amount of elution into the cleaning solution can be measured relatively accurately and quickly, and the corrosion resistance can be evaluated more quickly and more accurately than in the case of measuring conventional corrosion weight loss.
【００２４】また、本発明では試験用金属材Ａの構成元
素毎にその溶出量を知ることが出来るうえ、腐食生成物
の量が少ない場合には、従前の腐食減量を計測する耐食
性評価法よりも、より高精度な測定が可能となる。Further, according to the present invention, the elution amount of each constituent element of the test metal material A can be known, and when the amount of the corrosion product is small, the corrosion resistance evaluation method for measuring the conventional corrosion weight loss is used. Also, more accurate measurement can be performed.
【００２５】更に、本発明では腐食の程度を各構成元素
の溶出量から定量的に把握する構成としているため、従
前の目視による外観観察のように耐食性の評価に主観的
要素の入り込む余地がなく、より観客的な耐食性評価が
可能となる。本発明は上述の通り、優れた実用的効用を
奏するものである。Further, in the present invention, since the degree of corrosion is quantitatively grasped from the elution amount of each constituent element, there is no room for subjective factors to be included in the evaluation of corrosion resistance unlike the conventional visual observation. Thus, more speculative corrosion resistance evaluation is possible. As described above, the present invention has excellent practical utility.
【図１】本発明の第１実施例に係る金属材の耐食性評価
方法の実施工程図である。FIG. 1 is a process diagram of a method for evaluating corrosion resistance of a metal material according to a first embodiment of the present invention.
【図２】本発明の第２実施例に係る金属材の耐食性評価
方法の実施工程図である。FIG. 2 is a process diagram of a method for evaluating corrosion resistance of a metal material according to a second embodiment of the present invention.
Ａは試験用金属材、Ｂは洗浄液（超純水）、Ｃは腐食性
ガス、１は腐食生成物形成工程、２は超音波洗浄工程、
３は原子吸光分析工程、４は評価工程、５はイオンクロ
マト分析工程。A is a test metal material, B is a cleaning liquid (ultra pure water), C is a corrosive gas, 1 is a corrosion product forming step, 2 is an ultrasonic cleaning step,
3 is an atomic absorption analysis step, 4 is an evaluation step, and 5 is an ion chromatography analysis step.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 17/00 - 17/04 G01N 21/31 G01N 30/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) G01N 17/00-17/04 G01N 21/31 G01N 30/02
Claims (2)
スと接触せしめた金属材を超純水から成る洗浄液中で超
音波洗浄をし、その後腐食生成物を含む前記洗浄液を原
子吸光分析して洗浄液内への金属材の構成元素の溶出量
を測定し、当該溶出量の測定値を基準として耐食性を評
価することを特徴とする金属材の耐食性評価方法。1. A metal material that has been brought into contact with a corrosive solution or a corrosive gas for a predetermined time is subjected to ultrasonic cleaning in a cleaning solution made of ultrapure water, and then the cleaning solution containing a corrosion product is subjected to atomic absorption analysis. A method for evaluating the corrosion resistance of a metal material, comprising: measuring an elution amount of a constituent element of the metal material into a cleaning liquid, and evaluating the corrosion resistance based on the measured value of the elution amount.
属材を超純水から成る洗浄液中で超音波洗浄をし、その
後腐食生成物を含む洗浄液を原子吸光分析して洗浄液内
への金属材の構成元素の溶出量を測定すると共に、前記
洗浄液をイオンクロマトを用いて分析することにより洗
浄液中のＣｌイオン量を測定し、前記構成元素の溶出量
及びＣｌイオン量の測定値を基準にして耐食性を評価す
ることを特徴とする腐食性ガスに対する金属材の耐食性
評価方法。2. A metal material which has been brought into contact with a corrosive gas for a predetermined time is subjected to ultrasonic cleaning in a cleaning solution made of ultrapure water, and thereafter, the cleaning solution containing corrosion products is subjected to atomic absorption analysis, and the metal in the cleaning solution is removed. While measuring the elution amount of the constituent elements of the material, the amount of Cl ions in the cleaning solution is measured by analyzing the cleaning solution using ion chromatography, and the measured values of the elution amount of the constituent elements and the measured Cl ion amount are used as a reference. A method for evaluating the corrosion resistance of a metal material to a corrosive gas, characterized in that the corrosion resistance is evaluated by using a method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05059848A JP3097791B2 (en) | 1993-03-19 | 1993-03-19 | Evaluation method of corrosion resistance of metal materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05059848A JP3097791B2 (en) | 1993-03-19 | 1993-03-19 | Evaluation method of corrosion resistance of metal materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06273311A JPH06273311A (en) | 1994-09-30 |
| JP3097791B2 true JP3097791B2 (en) | 2000-10-10 |
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ID=13125035
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05059848A Expired - Fee Related JP3097791B2 (en) | 1993-03-19 | 1993-03-19 | Evaluation method of corrosion resistance of metal materials |
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| Country | Link |
|---|---|
| JP (1) | JP3097791B2 (en) |
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1993
- 1993-03-19 JP JP05059848A patent/JP3097791B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06273311A (en) | 1994-09-30 |
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