论文部分内容阅读
通过化学浸泡法、电化学法和失重法研究了用E2209、E309Mo和E309三种焊材所得Q345R与S31803异种钢手工电弧焊接头的耐蚀性能,并采用能谱法对晶间腐蚀产物进行了分析。结果表明:在化学浸泡法试验中,三种焊缝的耐腐蚀性能相差不大,随腐蚀时间延长,点蚀坑不断长大,最终得到深而大的腐蚀坑,但不能很好地区分三种焊缝耐点蚀性能的差异;在电化学法试验中,母材S31803的自腐蚀电位最大,耐点蚀性能最好,其次分别为E2209、E309Mo和E309;在失重法试验中,耐晶间腐蚀能力排序为S31803>E2209>E309Mo>E309;晶间腐蚀产物的能谱分析表明,腐蚀产物中的Cr/Ni值均高于原始的Cr/Ni值,三种焊材基本能够达到与S31803母材接近的抗腐蚀能力。
The corrosion resistance of Q345R and S31803 dissimilar steel hand-held arc welded joints obtained by using E2209, E309Mo and E309 welding consumables was investigated by chemical immersion method, electrochemical method and weight loss method. The intergranular corrosion products were also analyzed by energy spectrum analysis. The results show that in the chemical immersion test, the corrosion resistance of the three kinds of weld is similar. With the prolongation of the corrosion time, the pitting pit keeps growing up and finally the deep and large corrosion pits are obtained, but it can not distinguish the three In the electrochemical test, the self-corrosion potential of the base material S31803 is the largest and the pitting corrosion resistance is the best, followed by E2209, E309Mo and E309, respectively. In the weight loss test, the resistance to crystallization The results of energy spectrum analysis of intergranular corrosion products show that the Cr / Ni values of the corrosion products are higher than the original Cr / Ni values, and the three kinds of welding consumables can basically reach the values of those of S31803> E2309> E309Mo> E309. Near the base metal corrosion resistance.