Influence of the Trace Boron Element on Corrosion Behavior of 1Cr17 Stainless Steel in 10% Hcl Solution

2013 ◽  
Vol 648 ◽  
pp. 67-72 ◽  
Author(s):  
Tie Ming Guo ◽  
Zhi Hui ◽  
Xue Li Nan ◽  
Chang Song Han ◽  
Ding Cang Zhang
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Corrosion Behavior ◽  
Hydrochloric Acid Solution ◽  
Steel Sample ◽  
Vacuum Induction Furnace ◽  
General Corrosion ◽  
Stainless Steel Sample ◽  
Tafel Polarization

Four groups of 1Cr17 stainless steel with diffirent wt% of boron ( 0ppm, 16ppm, 22ppm and 28ppm ) were smelted by a vacuum induction furnace. Then chemical immersion and electrochemical method (the tafel polarization curve method) were used to investigate their corrosion behavior at different temperature (25 °C, 40 °C) in HCL medium . The results show that after adding Boron elements of the 1Cr17 stainless steel sample, it is obvious that its resistance to general corrosion increases and the resistance to intergranular corrosion weakens; at different temperature (25°C, 40°C)in 10% hydrochloric acid solution medium the Corrosion kinetics law are different, while with B element content increases, the immersion corrosion rate decreases. in the reducing hydrochloric acid solution, sample with boron elements show a good behavior on corrosion resistance.

Research of the Boron Element on Corrosion Behavior of 1Cr17 Stainless Steel in 3.2%HCl+3.8%HNO3 Solution

2013 ◽  
Vol 675 ◽  
pp. 235-239 ◽  
Author(s):  
Tie Ming Guo ◽  
Zhi Hui ◽  
Xue Li Nan ◽  
Chang Song Han ◽  
Zhong Jie Tang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
Steel Sample ◽  
General Corrosion ◽  
Stainless Steel Sample ◽  
Corrosion Morphology ◽  
Hno3 Solution ◽  
Tafel Polarization ◽  
Curve Method

Four groups of 1Cr17 stainless steel with boron quality score as 0ppm,16ppm, 22ppm and 28ppm were used to research their corrosion behavior by chemical immersion, electrochemical method (the tafel polarization curve method) at different temperature(25 °C, 40 °C) in 3.2%HCl＋3.8%HNO3 medium.The results show that at different temperature (25°C, 40°C)in3.2%HCl＋3.8%HNO3 medium, Corrosion kinetics law is different,with B element content increased,the immersion corrosion rate decreased; meanwhile, both of Soaked and electrochemical corrosion results show that the added Boron elements of the 1Cr17 stainless steel sample improves its resistance to general corrosion ,but its resistance to intergranular corrosion weakened , which can see by the corrosion morphology.

Corrosion Behavior of Austenitic Stainless Steel in Hydrochloric Acid Solution and Flow

2016 ◽  
Vol 850 ◽  
pp. 78-85 ◽  
Author(s):  
Bing Yi Liu ◽  
Ya Jun Xue ◽  
Zong Hui Yang ◽  
Xin Xian Fang
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Stainless Steels ◽  
Phase Flow ◽  
Medium Temperature ◽  
Corrosion Rates ◽  
Steel Increase ◽  
Selective Corrosion

The corrosion behaviors of austenitic stainless steels, 304 and 316L as a contrast material, are investigated in hydrochloric acid corrosion under different conditions including immersion corrosion, single-phase flow and two-phase flow, respectively. The corrosion mass loss test and electrochemical test were carried out to evaluate the influence of medium temperature and concentration. The specimen surface morphologies and chemical compositions were obtained using scanning electron microscope to analyze the corrosion mechanism. The results show that the static corrosion rates of 304 and 316L steels and erosion corrosion rates of 304 steel increase obviously with the medium temperature increasing, but, the effect of hydrochloric acid concentration on their corrosion rate is less than that of the temperature. The corrosion current density values of 304 stainless steel increase and its passivation region of the polarization curve becomes narrowing and disappeared as the medium temperature increase. Uniform corrosion is the main way found on the surfaces of the stainless steels at room temperature in the hydrochloric acid solution. However, the selective corrosion occurs on their surface with the medium temperature increasing, and the higher temperature and concentration of corrosion medium, the more serious selective corrosion.

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