Microbial corrosion-resistant pipeline steel and preparation method thereof
A technology of anti-microbial and pipeline steel, applied in the field of pipeline steel, can solve the problems of less antibacterial performance and deterioration of processing performance, achieve excellent toughness and improve microbial corrosion resistance
Active Publication Date: 2020-05-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
This new type of pipeline steel can effectively solve the shortcomings of poor processing performance caused by too much Cu addition and insufficient antibacterial performance caused by too little Cu addition. and transportation materials, has important engineering application value
Method used
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[0027] The present invention will be described below by comparing various examples and comparative examples. These examples are for the purpose of explanation only, and the present invention is not limited to these examples.
[0028] Table 1 is the chemical composition of various steels in Examples and Comparative Examples. The steels of various embodiments and comparative examples are made into steel plates through thermomechanical controlled rolling and controlled cooling, and the specific preparation steps are:
[0029] (1) The poured steel ingot is heated and forged in the austenite single-phase region, the initial forging temperature range is 1100-1200 °C, the final forging temperature is not lower than 850 °C, and air-cooled after forging;
[0030] (2) The forged billet is placed in a 1200±50°C heat treatment furnace for homogenization treatment for 4 hours, and then subjected to thermomechanical controlled rolling. The initial rolling temperature is 1100-1200°C, and the...
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The invention aims to provide a pipeline steel capable of resisting against microbiological corrosion, in order to reduce the risk of microbiological corrosion at the aspect of materials. The pipelinesteel comprises the following chemical components by weight percent: 0.02-0.08% of C, 0.1-0.5% of Si, 0.5-1.2% of Mn, 0.1-1.0% of Cu, 0.1-0.8% of Ga, 0.01-0.2% of Ce, less than or equal to 0.02% of S, less than or equal to 0.03% of P and the balance of Fe and inevitable impurities. According to the invention, a defined amount of Cu, Ga and rare earth element Ce are compounded and added, so that the microbiological corrosion resistance can be promoted under the condition that other properties of the pipeline steel are kept; the novel pipeline steel is capable of effectively overcoming the defects of deterioration of processability caused by excessive added Cu and insufficient mold resistance caused by less Cu; the pipeline steel is expected to become an ideal material for gathering and transporting petroleum and natural gas, with high toughness, high hydrogen induced cracking resistance and high microbiological corrosion resistance; the pipeline steel has an important engineering application value.
Description
technical field [0001] The invention belongs to the technical field of pipeline steel, in particular to pipeline steel with microbial corrosion resistance. The pipeline steel of the invention can significantly reduce the risk of microbial corrosion in the service environment, and can be applied to the production of pipeline steel for gathering and transporting oil and natural gas. Background technique [0002] Microbial corrosion is an important cause of buried pipeline corrosion. According to statistics, 15-30% of pipeline corrosion is related to microbial corrosion. With the increase of pipeline failure cases caused by microbial corrosion, the corrosion of oil and gas pipelines caused by microorganisms has attracted great attention at home and abroad. The economic loss caused by microbial corrosion is huge, and it is difficult to prevent and control. At present, the microbial corrosion protection of pipelines has not been paid much attention in China, and the existing o...
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IPC IPC(8): C22C38/02C22C38/04C22C38/16C22C38/12C22C38/14C22C38/06C22C38/08C22C38/42C22C38/48C22C38/46C22C38/50C22C38/54C22C38/44C21D8/02
CPCC21D8/0226C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/32C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
Inventor 史显波杨春光杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI