Brass corrosion - dezincification in hydrochloric acid

被引：0

作者：

Fickenscher, Thomas ^{[1
]}

Schroeer, Jasmin ^{[1
]}

Reckeweg, Olaf ^{[2
]}

Poettgen, Rainer ^{[1
]}

机构：

[1] Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 30, D-48149 Munster, Germany

[2] Gymnasium Ernestinum Rintein, Paul Erdniss Str 1, D-31737 Rinteln, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2024年 / 79卷 / 8-9期

关键词：

acidic corrosion; demonstration experiments; electrochemistry;

D O I：

10.1515/znb-2024-0052

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Brass is among the utility metals for daily life. We present an easy corrosion experiment for demonstration in high school or first-year undergraduate studies. Almost any kind of brass can be dezincified in 1 m hydrochloric acid. Copper as the noble component remains as salmon pink coating on the workpiece while zinc and lead, the latter being a frequent minor alloying component of brass, are dissolved. Lead can be detected as PbS (in-situ generation of H2S from a splinter of FeS or as PbI2 using KI). Zinc can be analyzed as Rinmann's green or via a microchemical drop reaction with dithizone.

引用

页码：475 / 479

页数：5

共 16 条

[1] [Anonymous], About us
[2] Dobbins J. T., 1950, J CHEM EDUC, V27, P604, DOI [https://doi.org/10.1021/ed027p604, DOI 10.1021/ED027P604]
[3] Determination of Copper and Zinc in Brass: Two Basic Methods
Fabre, Paul-Louis
Reynes, Olivier
[J]. JOURNAL OF CHEMICAL EDUCATION, 2010, 87 (08) : 836 - 837
[4] Fischer H., 1930, MIKROCHEMIE, V8, P319, DOI https://doi.org/10.1007/bf02759138
[5] Rinmans green
Hedvall, JA
[J]. ZEITSCHRIFT FUR ANORGANISCHE CHEMIE, 1914, 86 (02): : 201 - 224
[6] illumina-chemie, US
[7] Langner B. E., 2011, UNDERSTANDING COPPER
[8] Langner B. E., 2022, UNDERSTANDING NONFER
[9] McCormick P. D. B., 1975, J CHEM EDUC, V52, P102, DOI [https://doi.org/10.1021/ed052p102.2, DOI 10.1021/ED052P102.2]
[10] Mizutani U, 2011, HUME-ROTHERY RULES FOR STRUCTURALLY COMPLEX ALLOY PHASES, P1

← 1 2 →