依照ASTM G161 《腐蚀失效分析标准指南》,编辑整理了腐蚀失效分析检查单,如下。
1、关键因素的识别Identification of key factors
(1)设备名称Name of equipment
(2)失效部位的名称和描述(含尺寸)Name and description(including dimensions) of failed part
(3)失效的日期和时间Date and time of failure
(4)失效位置Location of failure
(5)失效位置的可获取性Accessibility of failure location
(6)关键人员姓名Name of key personnel
2、失效条件概览(使用日记、示意图、照片、视频资料)Overview of failure conditions(Use notes, sketches, photographs, and video tapes)
(1)失效位置Physical arrangement
(2)现场气味Smells or odors
(3)颜色Colors
(4)沉积物或残留物Deposits or residues
(5)周围的环境条件Surrounding conditions
(6)现场位置调整的证据Evidence of rearrangement or movement
3、失效分析计划总览(人员、工作内容、工作时间、工作地点)Overall plan of attack(include who, what, when, where for each action)
(1)信息类型Types of information
(2)文件类型Types of documentation
(3)取样Sampling
(4)测试Testing
(5)评估Evaluations
(6)报告Reporting
4、信息类型Types of information
(1)失效时的服役条件Conditions at time of failure
①工艺参量Process variables
②天气Weather
③人员活动Observations by personnel
④稳定状态Stability
⑤正常或异常现象Normal or unusual
⑥开启/停车/维修/停用/建设;Startup/shutdown/maintenance/layup/construction
(2)历史信息History
①设计资料Design
②建设和组装资料Construction/fabrication
③建筑材料Materials of construction
④改造Modifications
⑤运行Operation
⑥工艺变更Process changes
⑦以往失效记录Previous failures
⑧维护记录Maintenance practices
⑨清理记录Cleaning practices
⑩维修记录Repairs
5、文件类型Types of documentation
(1)运行日记Operating charts and logs
(2)天气状况Weather station observations
(3)工艺材料规范(含MSDS手册)Process materials specification(including materials safety data sheets(MSDS))
(4)建设用材料规范和证明材料Materials of construction specification and certifications
(5)安装规范Fabrication specifications
(6)竣工图As-built drawings
(7)取样计划(拍照、位置识别)Sampling plan(including identification system photographs, and locations)
(8)测试报告Test reports
(9)现场检查记录、示意图、影像资料Site inspection notes, sketches, photographs, and video tapes
(10)调研记录Interview notes and tapes
6、取样Sampling
(1)金属(失效和未失效)Metal(failed and unfailed)
(2)工艺材料Process materials
(3)腐蚀产物Corrosion products
(4)其他沉积物、残留物Other deposits and residues
(5)环境(气体、水、土壤、其他)Environmental (air, water, soil, and other)
7、测试Testing
(1)金属成分Metal composition
(2)金属机械性能Metal mechanical properties
(3)金属物理性能Metal physical properties
(4)电化学测试结果Electrochemical test results
(5)腐蚀产物组成Corrosion product composition
(6)沉积物、残留物组分(如,微生物等)Deposit and residue composition (including microbiological, if conducted)
(7)环境构成(介质浓度、污染物等)Environment composition (including concentrations and contaminants)
(8)pH值、温度、导电率Environment pH, temperature, and conductivity
(9)工艺介质材料和组分Process material composition
(10)腐蚀类型、微观组织、端口形貌Corrosion type and morphology (micro-structures, fractography)
(11)工艺参数模拟Process simulation exposures
(12)EDS或其他表面分析技术Surface analysis by EDS or other suitable technique
8、评估Evaluations
(1)实验结果和规范Test results versus specifications
(2)腐蚀机理Corrosion mechanism
(3)腐蚀成因Cause of corrosion
(4)腐蚀测量和计算Measurement and calculations of extent of corrosion
(5)实际腐蚀速率和预测腐蚀速率的差异(如有)Discrepancies (if any) between predicted and actual corrosion rates
9、报告Reports
(1)过程报告或中期报告Progress or interim
(2)最终报告Final
附:最常见的腐蚀失效类型The most common corrosion related failure modes
(1)全面腐蚀General corrosion
(2)电偶腐蚀Galvanic corrosion
(3)应力腐蚀Stress corrosion
(4)点腐蚀Pitting
(5)冲蚀磨蚀Erosion and wear
(6)氢脆Hydrogen embrittlement
(7)微生物腐蚀Micro biologically induced corrosion(MIC)
(8)高温腐蚀(氧化,碳化,硫化)Surface reactions(Oxidation, Carburization, Sulfidation)
(9)焊缝腐蚀Weld corrosion
(10)晶间腐蚀Intergranular corrosion
(11)腐蚀疲劳Corrosion fatigue
注1:参考ASTM G161 Standard Gudie for Corrosion Related Failure Analysis整理;
注2:图片来源SwRI。
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