Analysis of the Corrosion Scales Formed on API 5L X70 and X80 Steel Pipe in the Presence of CO2

被引：9

作者：

Forero, A. B. ^{[1
]}

Nunez, Milagros. M. G. ^{[1
]}

Bott, I. S. ^{[1
]}

机构：

[1] Pontificia Univ Catolica Rio de Janeiro, PUC Rio, Mat Engn Dept DEMa, BR-22453 Rio De Janeiro, RJ, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2014年 / 17卷 / 02期

关键词：

CO2; corrosion; weight loss; SEM; X-ray diffraction; API 5L X70 and X80 steels; CARBON-DIOXIDE CORROSION; MICROSTRUCTURE; MECHANISM; PRODUCT; LAYER;

D O I：

10.1590/S1516-14392013005000182

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Longitudinal welded joints samples of X70 and X80 API grade steel pipes were exposed to a deaerated 1% NaCl solution containing CO2, at temperatures in the range of 25 degrees C to 80 degrees C for 48 hours. Analogous samples were exposed to the adjacent vapour phase. The layer of corrosion products which formed on the base metal and welded regions of the samples was investigated using mass loss determinations, scanning electron microscopy and X-ray diffraction. The corrosion products formed in tests at 60 degrees C and were composed of FeCO3. The FeCO3 which had initially formed at 80 degrees C was observed to have subsequently decomposed, resulting in a layer of Fe2O3.

引用

页码：461 / 471

页数：11

共 35 条

[1] Effect of microstructure on corrosion of steels in aqueous solutions containing carbon dioxide [J].

Al-Hassan, S ;

Mishra, B ;

Olson, DL ;

Salama, MM .

CORROSION, 1998, 54 (06) :480-491

[2] Preferential weld corrosion of X65 pipeline steel in flowing brines containing carbon dioxide [J].

Alawadhi, K. ;

Robinson, M. J. .

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY, 2011, 46 (04) :318-329

[3]

[Anonymous], 2011, ANN BOOK ASTM STAND

[4] Role of conductive corrosion products in the protectiveness of corrosion layers [J].

Crolet, JL ;

Thevenot, N ;

Nesic, S .

CORROSION, 1998, 54 (03) :194-203

[5]

De Waard C, 1975, P 1 INT C INT EXT PR

[6] Effect of steel microstructure on corrosion rate and protective iron carbonate film formation [J].

Dugstad, A ;

Hemmer, H ;

Seiersten, M .

CORROSION, 2001, 57 (04) :369-378

[7]

Dugstad A, 1992, P CORR 1992 HOUST

[8] Investigation of carbon dioxide corrosion of mild steel in the presence of acetic acid - Part 1: Basic mechanisms [J].

George, K. S. ;

Nesic, S. .

CORROSION, 2007, 63 (02) :178-186

[9]

Hebb TL, 1970, DIFFERENTIAL THERMAL, V1

[10] Microstructure analysis of coupons exposed to carbon dioxide corrosion in multiphase flow [J].

Heuer, JK ;

Stubbins, JF .

CORROSION, 1998, 54 (07) :566-575

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