理化检验-物理分册
理化檢驗-物理分冊
이화검험-물리분책
Physical Testing and Chemical Analysis Part A:Physical Testing
2015年
11期
806-809
,共4页
关锰%王冬颖%程从前%李倩%赵杰
關錳%王鼕穎%程從前%李倩%趙傑
관맹%왕동영%정종전%리천%조걸
海水泵%316L不锈钢%腐蚀%电火花%电偶
海水泵%316L不鏽鋼%腐蝕%電火花%電偶
해수빙%316L불수강%부식%전화화%전우
seawater pump%316L stainless steel%corrosion%electric spark%galvanic couple
针对海水泵叶轮316L不锈钢螺钉的腐蚀现象,综合运用宏观检验、金相检验、化学成分分析、扫描电镜与能谱分析,以及动电位极化分析方法对螺钉的腐蚀原因进行了分析。结果表明:腐蚀螺钉的化学成分不符合316L不锈钢的标准要求,且高脉冲电流电火花加工的变质层中存在微裂纹,该变质层的局部残留进一步降低了螺钉的耐蚀性,最后对提高螺钉耐蚀性提出了相应建议。
針對海水泵葉輪316L不鏽鋼螺釘的腐蝕現象,綜閤運用宏觀檢驗、金相檢驗、化學成分分析、掃描電鏡與能譜分析,以及動電位極化分析方法對螺釘的腐蝕原因進行瞭分析。結果錶明:腐蝕螺釘的化學成分不符閤316L不鏽鋼的標準要求,且高脈遲電流電火花加工的變質層中存在微裂紋,該變質層的跼部殘留進一步降低瞭螺釘的耐蝕性,最後對提高螺釘耐蝕性提齣瞭相應建議。
침대해수빙협륜316L불수강라정적부식현상,종합운용굉관검험、금상검험、화학성분분석、소묘전경여능보분석,이급동전위겁화분석방법대라정적부식원인진행료분석。결과표명:부식라정적화학성분불부합316L불수강적표준요구,차고맥충전류전화화가공적변질층중존재미렬문,해변질층적국부잔류진일보강저료라정적내식성,최후대제고라정내식성제출료상응건의。
Aiming to the corrosion phenomenon of 316L stainless steel bolt of seawater pump impeller,the cause of bolts corrosion was analyzed through macroscopic and metallographic inspection,chemical composition analysis,scanning electron microscopy and energy spectrum analysis,and potentiodynamic polarization analysis. The results show that the chemical composition of the corroded bolts didn’t meet the standard requirement,and microcracks existed in the metamorphic layer after sparkle drilling under high pulse current.The existence of residual metamorphic layer further degraded the corrosion resistance.Finally the corresponding suggestion was recommended to enhance the bolts corrosion resistance.