Synthesis of Local Corrosion Inhibitors and Establishment of Evaluation Technique for Their Inbibiting Effect by Alternate Method
| Project/Area Number |
59850119
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
金属材料(含表面処理・腐食防食)
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| Research Institution | Oyama National College of Technology |
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Principal Investigator |
OKUYAMA Masaru Oyama National College of Technology, Proffesor, その他, 教授 (50042528)
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| Co-Investigator(Kenkyū-buntansha) |
KAMBE Satoshi Oyama National College of Technology, Proffesor, 工業化学科, 教授 (00042507)
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1985: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1984: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Inhibitor / FFT-Alternate Impedance Method / Local Corrosion / Stainless Steel / アルミニウム / 有機抑制剤 / 孔食 |
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| Research Abstract |
The purpouse of this study is firstly synthesis of new hetero-cyclic organic compounds as the inhibitors for local corrosions of stainless steel,aluminum and etc.,and is secondly development of the alternate impedance measurement for the evaluation of inhibition.
From the results, pyrimidines were the most useful as inhibitors among the synthesized heterocycric compounds. It was found that their derivatives which had substitutional functions containing O or S at second place of a cycle is the most effective. A thiazole system was also effective but independent of substitutional plase. These useful inhibitors adsorbed on the metals and controled both anodic and cathodic corrosion reactions.
For the alternate impedance measurement, FFT-mathod for measurement was employed, because of possibility to measure in a short time. Therfore, time dependence could be easily measured. In the process of pitting, a resistance component was remarkably changing during the induction time, but atained a constant value when pits were generated. Therfore, the inhibition effects of the compounds could be evaluated by the values of resiprocal resistance and induction time to pitting coud be estimated.
In conclusion, FFT method for impedance measurement was a powerful tool for evaluation of inhibitors.
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Report
(2 results)
Research Products
(11 results)
