the critical temperatures of a thermomechanical process have a great importance for the final microstructure and mechanical properties of high strength low alloy steels. in this study, the average scheduling was used to determine the critical temperatures of api x70 steel. this steel is extensively used in iran for large diameter, high-pressure gas transportation pipelines as well as the oil tr...

Friction stir welding (FSW) is an excellent alternative process used in pipelines circumferential welds due to fusion welded joint low corrosion resistance. This study describes the resistance as a function of microstructural features resulting from API X70 FSW joint. The were examined by optical microscopy, scanning electron and x-ray diffraction. analysis was conducted employing potentiodynam...

The aim of the research is the development and testing of new methods to classify the quality of metallographic samples of steels with high added value, for example, grades X70 according API. In this paper, we address the development of methods to classify the quality of slab samples images with the main emphasis on the quality of the image center called as a segregation area. For this reason, ...

In the present work, compound 3´-(2,6-dimethoxybenzoyl)-benzyl 2,6-dimethoxybenzoate (RM4) was evaluated for its ability as a corrosion inhibitor in 3% chloride medium and using an API 5L X70 steel working electrode. The electrochemical system by techniques such polarization curves (CP) impedance spectroscopy (EIS), finding through values obtained that efficiency of at 50 ppm reached 73.2% agai...