RU1797014C - Method of the estimate of the corrosion stability of the low-alloyed steel - Google Patents
Method of the estimate of the corrosion stability of the low-alloyed steelInfo
- Publication number
- RU1797014C RU1797014C SU914908532A SU4908532A RU1797014C RU 1797014 C RU1797014 C RU 1797014C SU 914908532 A SU914908532 A SU 914908532A SU 4908532 A SU4908532 A SU 4908532A RU 1797014 C RU1797014 C RU 1797014C
- Authority
- RU
- Russia
- Prior art keywords
- estimate
- low
- alloyed steel
- corrosion stability
- steel
- Prior art date
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Description
катодном направлени х в заданном диапазоне потенциалов при посто нной скорости его развертки.cathodic directions in a given potential range at a constant sweep speed.
Далее рассчитываетс отношение количеств анодного электричества, затрачивав- мого при обратном (Qp - зар д реактивации) и пр мом (Qa - зар д пассивации ) ходе потенциодинамических кривых А Ор (Оз) или площадей кривой реактивации и активации Sp(Sa). Возможный пик тока-на кривой реактивации должен быть св зан с неоднородностью образованной в режиме пр мой развертки потенциала пассивной пленки, вызванной ликвационной или структурными неоднородност ми металла. Чем больше пик тока на кривой реактивации , тем.выше значение параметра А, тем ниже коррозионна стойкость исследуемой стали.Then, the ratio of the amounts of anode electricity spent during the reverse (Qp — charge of reactivation) and direct (Qa — charge of passivation) potentiodynamic curves A Op (Oz) or areas of the reactivation and activation curve Sp (Sa) is calculated. A possible current peak on the reactivation curve should be related to the heterogeneity of the passive film formed in the direct sweep mode caused by segregation or structural metal inhomogeneities. The larger the current peak on the reactivation curve, the higher the value of parameter A, the lower the corrosion resistance of the steel under study.
Электролит, используемый в предлагав- мом способе, одинаково применим как в жидком, так и в загущенном состо ни х.The electrolyte used in the proposed method is equally applicable in both the liquid and the thickened state.
Сталь марок 15Х2МФА(48ТС), 1Х2М,ст. 20 была испытана по предлагаемому способу как в жидком, так и в загущенном элект- ролитах. Параметры приведены в таблице.Steel grades 15X2MFA (48TS), 1X2M, Art. 20 was tested by the proposed method in both liquid and gelled electrolytes. The parameters are given in the table.
Данные приведенные в таблице, показывают , что результаты испытаний, полученные как в жидком, так и в загущенном электролитах аналогичны.The data in the table show that the test results obtained in both liquid and gelled electrolytes are similar.
Положительный эффект за вл емого технического решени достигаетс за счет, повышени достоверности оценки коррозиA positive effect of the claimed technical solution is achieved by increasing the reliability of the corrosion assessment
онной стойкости низколегированной стали, т. е. ее работоспособности,the durability of low alloy steel, i.e., its performance,
Исследуема поверхность металла приводитс в контакт с электролитом и пол ризуетс последовательность в анодном и катодном направлени х в заданном диапазоне потенциалов при посто нной скорости его развертки. Площади Sa и Sp, ограниченные координатой фи соответствующей кривой , рассчитывают методом планиметрии из графика, полученного на х-у рекордере или значений зар дов, записанных на кулоно- метре или иными способами, например запоминанием сигналов ЭВМ.The studied metal surface is brought into contact with the electrolyte and the sequence is polarized in the anodic and cathodic directions in a given range of potentials at a constant sweep speed. The areas Sa and Sp limited by the phi coordinate of the corresponding curve are calculated by the planimetric method from the graph obtained on the x-y recorder or the values of the charges recorded on the coulometer or in other ways, for example, by storing computer signals.
Пример 1. Жидкий электролит за вл емого состава: 200 г/л H2SCM и + 800 г/л СзНвОз. Сталь 15Х2МФА.Example 1. A liquid electrolyte of the claimed composition: 200 g / L H2SCM and + 800 g / L SzNvOz. Steel 15X2MFA.
Термообработка 1000°С/700°С SP 0,37Heat treatment 1000 ° C / 700 ° C SP 0.37
Sa 0,56A 0,66 Термообработка 1000°С Sp 0,01Sa 0.56A 0.66 Heat treatment 1000 ° C Sp 0.01
За 0,045 А 0,22 П р и м е р 2,For 0.045 A 0.22 PRI me R 2,
Загущенный электролит за вл емого состава: 200 г/л НзЗСм + 700 г/л СзНеОз + +100 г/л SiOa. Сталь 15Х2МФА . Термообработка 1000°С SP 0,11The thickened electrolyte of the claimed composition was 200 g / L NZZSm + 700 g / L SzNeOz + + 100 g / L SiOa. Steel 15X2MFA. Heat Treatment 1000 ° C SP 0.11
Sa 0.47А 0,23 Термообработка 1000°С/700°С SP 0,29 Sa 0,47 А 0,62.Sa 0.47A 0.23 Heat treatment 1000 ° C / 700 ° C SP 0.29 Sa 0.47 A 0.62.
Фор мула изобретени 40 Способ оценки коррозионной стойкости низколегированной стали, по которому исследуема поверхность образца приводитс в контакт с кислотным электролитом, и последовательно пол ризуетс в анодном 45 и катодном направлени х в заданном диапазоне потенциалов и по виду анодных и катодных кривых оценивают стойкость стали , отличающийс тем, что, с целью повышени достоверности способа, исполь зуют электролит следующего состава, г/л:SUMMARY OF THE INVENTION 40 A method for evaluating the corrosion resistance of low alloy steel, by which a test surface of a sample is brought into contact with an acid electrolyte, and sequentially polarized in the anode 45 and cathode directions in a given potential range and the steel resistance is estimated by the shape of the anode and cathode curves. the fact that, in order to increase the reliability of the method, an electrolyte of the following composition is used, g / l:
Серна кислота 100-300Sulfuric acid 100-300
Глицерин700-900.Glycerin 700-900.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU914908532A RU1797014C (en) | 1991-02-06 | 1991-02-06 | Method of the estimate of the corrosion stability of the low-alloyed steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU914908532A RU1797014C (en) | 1991-02-06 | 1991-02-06 | Method of the estimate of the corrosion stability of the low-alloyed steel |
Publications (1)
Publication Number | Publication Date |
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RU1797014C true RU1797014C (en) | 1993-02-23 |
Family
ID=21559019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU914908532A RU1797014C (en) | 1991-02-06 | 1991-02-06 | Method of the estimate of the corrosion stability of the low-alloyed steel |
Country Status (1)
Country | Link |
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RU (1) | RU1797014C (en) |
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1991
- 1991-02-06 RU SU914908532A patent/RU1797014C/en active
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