Research on hydrogen sulfide corrosion and protection measures of gas gathering pipeline steel
Pipeline steel for gathering and transporting sulfur-containing oil and gas resources is prone to corrosion damage caused by hydrogen sulfide.In order to identify the corrosion pattern of pipeline steel under the presence of hydrogen sulfide and propose targeted corrosion protection measures,a high-temperature and high-pressure dynamic corrosion experimental device was used to evaluate the impact of different factors such as hydrogen sulfide partial pressure on the corrosion rate of X65 pipeline steel,and targeted corrosion protection measures were proposed.The results showed that the presence of hydrogen sulfide has a significant impact on the corrosion of X65 pipeline steel used for gathering and transportation in the target oilfield.The corrosion rate of hanging pieces first increases and then decreases with the partial pressure of hydrogen sulfide;The higher the pH value of the corrosive medium,the lower the corrosion rate;The higher the experimental temperature,the higher the experimental flow rate,and the higher the water content of the corrosive medium,the relatively higher the corrosion rate.The addition of imidazoline type composite corrosion inhibitor HSR-1 can significantly reduce the hydrogen sulfide corrosion rate of hanging pieces.When the mass fraction of HSR-1 is 0.05%,its corrosion inhibition efficiency on hanging pieces can reach over 95%,reducing the corrosion rate to 0.038mm·a-1,and playing a good corrosion protection effect.
oil and gas gathering and transportation pipeline steelhydrogen sulfidecorrosion influencing fac-torscorrosion inhibitorsprotective measures
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