摘要
With an alloy content as high as 80%or more,Ni-based OCTG is a strategic products related to the state energy security,mainly applied in the exploitation and development of sour gas fields with complicate geological formation,high temperature,high pressure and severe corrosive well conditions.Ni-based OCTG is regarded as the pipe product with most high technologies due to the complexity and great difficulty in manufacturing and rigorous requirements in quality control.In this paper,the technical features and quality requirements of Ni-based OCTG are summarized,and the quality and properties of the Ni-based OCTG products of Baosteel are introduced in detail.With the help of SEM,XPS and TEM,the corrosion mechanism of Nickle-based OCTG in the environments containing H_2S,CO_2,Cl^- and elementary suifur are also analyzed.
With an alloy content as high as 80%or more,Ni-based OCTG is a strategic products related to the state energy security,mainly applied in the exploitation and development of sour gas fields with complicate geological formation,high temperature,high pressure and severe corrosive well conditions.Ni-based OCTG is regarded as the pipe product with most high technologies due to the complexity and great difficulty in manufacturing and rigorous requirements in quality control.In this paper,the technical features and quality requirements of Ni-based OCTG are summarized,and the quality and properties of the Ni-based OCTG products of Baosteel are introduced in detail.With the help of SEM,XPS and TEM,the corrosion mechanism of Nickle-based OCTG in the environments containing H_2S,CO_2,Cl^- and elementary suifur are also analyzed.
