{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T13:23:11Z","timestamp":1785763391952,"version":"3.56.0"},"reference-count":37,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T00:00:00Z","timestamp":1763683200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China for Regional Fund","award":["52562047"],"award-info":[{"award-number":["52562047"]}]},{"DOI":"10.13039\/100009110","name":"Natural Science Foundation of Xinjiang Uygur Autonomous Region","doi-asserted-by":"publisher","award":["2023D01A19"],"award-info":[{"award-number":["2023D01A19"]}],"id":[{"id":"10.13039\/100009110","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Xinjiang Uygur Autonomous Region \u201cTianchi talents\u201d introduction plan project","award":["TCYC12"],"award-info":[{"award-number":["TCYC12"]}]},{"name":"Xinjiang Tianshan Innovation Team for Research and Application of High-Efficiency Oil and Gas Pipeline Transportation Technology","award":["2022TSYCTD0002"],"award-info":[{"award-number":["2022TSYCTD0002"]}]},{"name":"Xinjiang Uygur Autonomous Region \u201cOne Case, One Policy\u201d Strategic Talent Introduction Project","award":["XQZX20240054"],"award-info":[{"award-number":["XQZX20240054"]}]},{"name":"Postdoctoral Research Project of PetroChina Southwest Oil & Gasfield Company","award":["2024D105-01-01"],"award-info":[{"award-number":["2024D105-01-01"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>This study aims to clarify the influence of H2S concentration and temperature on the sulfide stress corrosion cracking (SSCC) susceptibility of 20# steel weld joints. 20# steel is a commonly selected pipe material for ground gas pipelines, and there is a risk of welds cracking after years of service. The selection of a corrosive environment is based on the working conditions of high-sulfur oil fields on site. Slow strain rate tensile (SSRT) tests were conducted under simulated high-sulfur gathering and transportation conditions across varying temperatures and H2S concentrations. The mechanical properties, SSCC susceptibility, fracture morphology, and elemental composition of fracture surfaces were systematically analyzed. As H2S concentration increased (5%, 7.5%, 10%) and temperature decreased (30\u201360 \u00b0C), the elongation after fracture and the reduction in area of 20# steel decreased, while the yield strength and SSCC susceptibility increased. The H2S concentration range of 0\u20135% represented a critical sensitivity interval for the material, where elongation after fracture decreased by up to 74%. Within the 5\u201310% H2S range, elongation decreased by only 2.11%, indicating a slowing trend of fracture toughness deterioration, though SSCC susceptibility still increased by 12%. Increasing the temperature from 30 \u00b0C to 60 \u00b0C reduced SSCC susceptibility by approximately 30%, confirming higher susceptibility at lower temperatures. Temperature exerts a lesser influence on material performance than H2S concentration. Also, 20# steel remains within the SSCC brittle fracture sensitivity zone in sulfur-containing environments, necessitating strict quality control to avoid defects and stress concentrations. In high-sulfur environments (H2S &gt; 5%), further increases in H2S concentration have a diminished effect on cracking susceptibility.<\/jats:p>","DOI":"10.3390\/molecules30234499","type":"journal-article","created":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T11:04:31Z","timestamp":1763723071000},"page":"4499","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Study on Sulfide Stress Corrosion Cracking Susceptibility of 20# Steel Weld Joints in H2S-Rich Environments"],"prefix":"10.3390","volume":"30","author":[{"given":"Xinze","family":"Li","sequence":"first","affiliation":[{"name":"College of Engineering, China University of Petroleum (Beijing) at Karamay, Karamay Campus, Karamay 834000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanqi","family":"Ran","sequence":"additional","affiliation":[{"name":"College of Engineering, China University of Petroleum (Beijing) at Karamay, Karamay Campus, Karamay 834000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-6583-663X","authenticated-orcid":false,"given":"Zhiming","family":"Yu","sequence":"additional","affiliation":[{"name":"Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gas Field Company, Chengdu 610299, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ting","family":"Mao","sequence":"additional","affiliation":[{"name":"Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gas Field Company, Chengdu 610299, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"012115","DOI":"10.1088\/1755-1315\/859\/1\/012115","article-title":"Corrosion mechanism and anticorrosion technology of oil and gas gathering and transportation pipeline","volume":"859","author":"Cheng","year":"2021","journal-title":"IOP Conf. Ser. Earth Environ. Sci."},{"key":"ref_2","first-page":"472","article-title":"Statistical analysis and risk assessment of oil and gas pipeline accidents","volume":"36","author":"Liang","year":"2017","journal-title":"Oil Gas Storage Transp."},{"key":"ref_3","first-page":"31","article-title":"Stress corrosion sensitivity of martensitic stainless steel in H2S environment","volume":"43","author":"Zhao","year":"2022","journal-title":"Corros. Prot."},{"key":"ref_4","first-page":"737","article-title":"Research progress and prospects of stress corrosion cracking of pipeline steel in soil environments","volume":"41","author":"Yu","year":"2021","journal-title":"J. Chin. Soc. Corros. Prot."},{"key":"ref_5","first-page":"136","article-title":"Key technological advances and future directions in corrosion control for high-sulfur gas field development","volume":"44","author":"Yan","year":"2024","journal-title":"Nat. Gas Ind."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.engstruct.2019.04.037","article-title":"Study on the seismic performance of corroded H-shaped steel columns","volume":"191","author":"Xu","year":"2019","journal-title":"Eng. Struct."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"126838","DOI":"10.1016\/j.matchemphys.2022.126838","article-title":"Corrosion main control factors and corrosion degree prediction charts in H2S and CO2 coexisting associated gas pipelines","volume":"292","author":"Liao","year":"2022","journal-title":"Mater. Chem. Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"361","DOI":"10.1016\/S0950-0618(01)00009-5","article-title":"Effect of degree of corrosion on the properties of reinforcing steel bars","volume":"15","author":"Almusallam","year":"2001","journal-title":"Constr. Build. Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1016\/j.corsci.2012.10.016","article-title":"The effect of the partial pressure of H2S on the permeation of hydrogen in low carbon pipeline steel","volume":"67","author":"Zhou","year":"2013","journal-title":"Corros. Sci."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"185","DOI":"10.5006\/1.3581989","article-title":"Corrosion behavior of 9 to 25% Cr steels in wet CO2 environments","volume":"41","author":"Ikeda","year":"1985","journal-title":"Corrosion"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"778","DOI":"10.1002\/maco.202314252","article-title":"Wet H2S corrosion and degradation of pipeline in amine regeneration system","volume":"75","author":"Orlikowski","year":"2024","journal-title":"Mater. Corros."},{"key":"ref_12","first-page":"17","article-title":"Corrosion and Fracture Mechanism of Drilling Tools in Wet H2S Environment and Preventive Measures","volume":"32","author":"Xia","year":"2015","journal-title":"Corros. Prot. Petrochem. Ind."},{"key":"ref_13","first-page":"30","article-title":"Corrosion resistance and mechanism analysis of carbon steel pipes for oil and gas gathering and transportation","volume":"47","author":"Cui","year":"2021","journal-title":"Pet. Eng. Constr."},{"key":"ref_14","unstructured":"(2012). Covered Electrodes for Manual Metal Are Welding of Non-Alloy and Fine Grain Steels (Standard No. GB5117-2012)."},{"key":"ref_15","unstructured":"(2012). Code for Acceptance of Construction Quality of Field Equipment and Industrial Pipeline Welding Engineering (Standard No. GB 50683-2011)."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"012118","DOI":"10.1088\/1742-6596\/2383\/1\/012118","article-title":"Effect of welding parameters and post-welding heat treatment on the microstructure and properties of weld seam of 20# steel and 304 stainless steel","volume":"2383","author":"Li","year":"2022","journal-title":"J. Phys. Conf. Ser."},{"key":"ref_17","unstructured":"(2021). Standard for Welding Procedure Qualification of Oil and Gas Metal Pipeline (Standard No. SY\/T 0452-2021)."},{"key":"ref_18","unstructured":"(2023). Steel Pipe for Pipeline Transportation Systems (Standard No. GB\/T 9711-2023)."},{"key":"ref_19","unstructured":"(2008). Welding Street Bending Test Method (Standard No. GB\/T 2653-2008)."},{"key":"ref_20","unstructured":"(2021). Welding Procedure Evaluation of Petroleum and Natural Gas Metal Pipelines (Standard No. SY\/T 0425-2021)."},{"key":"ref_21","unstructured":"(2017). Corrosion of Metals and Alloys\u2014Stress Corrosion Testing\u2014Part 7: Slow Strain Rate Test (Standard No. GB\/T 15970.7-2017)."},{"key":"ref_22","unstructured":"Lu, Z.M., He, Z.Y., and Gao, Z.L. (2007). Calculation and regression analysis of stress corrosion susceptibility index for 316L stainless steel. J. Zhejiang Univ. Technol., 198\u2013200+236. (In Chinese)."},{"key":"ref_23","first-page":"159","article-title":"Experimental study on stress corrosion of 20 carbon steel in liquid ammonia","volume":"58","author":"Yang","year":"2025","journal-title":"Mater. Prot."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"117903","DOI":"10.1016\/j.conbuildmat.2019.117903","article-title":"Comparative study of the stress corrosion behavior of a multiuse bainite steel in the simulated tropical marine atmosphere and seawater environments","volume":"239","author":"Wu","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_25","first-page":"96","article-title":"Effect of slow strain rate on stress corrosion behavior of 2205 duplex stainless steel in saturated H2S environment","volume":"37","author":"Yang","year":"2016","journal-title":"Trans. Mater. Heat Treat."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"04023007","DOI":"10.1061\/JPSEA2.PSENG-1431","article-title":"Assessing Compatibility of Natural Gas Pipeline Materials with Hydrogen, CO2, and Ammonia","volume":"14","author":"Kass","year":"2023","journal-title":"J. Pipeline Syst. Eng. Pract."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"133734","DOI":"10.1016\/j.matlet.2022.133734","article-title":"Hydrogen embrittlement of 20# seamless steel in medium and low pressure gaseous hydrogen","volume":"334","author":"Du","year":"2023","journal-title":"Mater. Lett."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"105139","DOI":"10.1016\/j.ijpvp.2024.105139","article-title":"Experimental study on slow tensile, fatigue, and impact on X42 steel and #20 carburizing steel","volume":"208","author":"Shao","year":"2024","journal-title":"Int. J. Press. Vessel. Pip."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"108085","DOI":"10.1016\/j.corsci.2019.07.009","article-title":"Ion-selectivity of iron sulfides and their effect on H2S corrosion","volume":"158","author":"Sun","year":"2019","journal-title":"Corros. Sci."},{"key":"ref_30","first-page":"76","article-title":"Stress Corrosion Cracking Behavior of 2205 Duplex Stainless Steel in High Temperature and High Pressure H2S Containing Environment","volume":"43","author":"Zhao","year":"2024","journal-title":"Electroplat. Coat."},{"key":"ref_31","unstructured":"Zhang, D.L. (2017). Study on Stress Corrosion Behavior of 310S Austenitic Stainless Steel in High-Temperature and High-Pressure H2S\/CO2 Environments. [Master\u2019s Thesis, China University of Petroleum]. (In Chinese)."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"94","DOI":"10.1080\/09507116.2010.527054","article-title":"Susceptibility to hydrogen-induced cracking in H2S corrosion environment of API 5L-X80 welding metal","volume":"25","author":"Hilton","year":"2011","journal-title":"Weld. Int."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"109639","DOI":"10.1016\/j.corsci.2021.109639","article-title":"Influence of H2S on the general corrosion and sulfide stress cracking of pipelines steels for supercritical CO2 transportation","volume":"190","author":"Li","year":"2021","journal-title":"Corros. Sci."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1707","DOI":"10.1007\/s11665-019-03913-7","article-title":"Sulfide Stress Corrosion Cracking Behavior of G105 and S135 High-Strength Drill Pipe Steels in H2S Environment","volume":"28","author":"Luo","year":"2019","journal-title":"J. Mater. Eng. Perform."},{"key":"ref_35","unstructured":"Liu, C. (2022). Study on Stress Corrosion Cracking Behavior of Austenitic Stainless Steel in High Temperature and High Pressure H2S Environment. [Master\u2019s Thesis, China University of Petroleum]."},{"key":"ref_36","first-page":"87","article-title":"The influence of strip defects on the sensitivity of sulfide stress corrosion cracking in L360 pipeline steel circumferential welds","volume":"10","author":"Wang","year":"2024","journal-title":"Pet. Pipes Instrum."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"143552","DOI":"10.1016\/j.msea.2022.143552","article-title":"Effect of tensile stress response for oxide films on the fatigue failure behavior of anodized AA6082 alloys","volume":"850","author":"Zhu","year":"2022","journal-title":"Mater. Sci. Eng. A"}],"container-title":["Molecules"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1420-3049\/30\/23\/4499\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T11:05:14Z","timestamp":1763723114000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1420-3049\/30\/23\/4499"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,11,21]]},"references-count":37,"journal-issue":{"issue":"23","published-online":{"date-parts":[[2025,12]]}},"alternative-id":["molecules30234499"],"URL":"https:\/\/doi.org\/10.3390\/molecules30234499","relation":{},"ISSN":["1420-3049"],"issn-type":[{"value":"1420-3049","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,11,21]]}}}