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Environmental Cracking (HB/HIC/SWC/SOHIC/SSC/SZC/HSC/HE/SCC):
Recognition, Mechanisms and Prevention

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 Course Overview


SCC, HIC, HSC, SZC, SSCEnvironmental Cracking is one of the key factors that can affect the structural integrity or limit the life of metallic structures. Environmental cracking is a general term that includes: stress corrosion cracking (SCC), caustic cracking,  liquid metal cracking, corrosion fatigue, hydrogen blistering, hydrogen embrittlement (HE), hydrogen-induced cracking (HIC), stepwise cracking (SWC), stress-oriented hydrogen-induced cracking (SOHIC), sulfide stress cracking (SSC), soft-zone cracking (SZC), and hydrogen stress cracking (HSC).


This 5-day corrosion short course systematically and thoroughly covers the recognition, mechanisms, test methods and prevention of the various types of cracking phenomena. Also discussed in this corrosion short course is the NACE MR0175/ISO 15156 standard for the selection of crack-resistant materials for use in H2S-containing oil and gas environments.


This course is available for in-house training, online and distance learning worldwide. It can also be customized to meet the specific needs of your organization.


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 Course Outline

1. Introduction

2. Corrosion Basics

3. Overview of Environmental Cracking

     Recognition, Mechanisms and Prevention

     4.1 Overview of Hydrogen Damage

     4.2 Hydrogen Blistering (HB) and HIC/SWC

     4.3 High Temperature Hydrogen Attack (HTHA)
     4.4 Hydrogen Embrittlement
     4.5 Hydride Embrittlement

     4.6 Hydrogen Induced Cracking (HIC), Stepwise Cracking (SWC) & SOHIC
          4.6.1 Definition

          4.6.2 Recognition
          4.6.3 Mechanisms
          4.6.4 Factors Influencing HIC, SWC and SOHIC
           Environmental Factors
           Metallurgical Factors
           4.6.5 Prevention and Control

    4.7 Sulfide Stress Cracking (SSC) and Soft Zone Cracking (SZC)
           4.7.1 Definition

           4.7.2 Recognition
           4.7.3 Mechanisms
           4.7.4 Factors Influencing SSC and SZC
            Environmental Factors
            Metallurgical Factors
           4.7.5 Prevention and Control

    4.8 Hydrogen Stress Cracking (HSC) and Hydrogen Embrittlement (HE)

           4.8.1 Definition

           4.8.2 Recognition
           4.8.3 Mechanisms
           4.8.4 Factors Influencing HSC and HE
            Environmental Factors
            Metallurgical Factors
           4.8.5 Prevention and Control

    4.9 Stress Corrosion Cracking (SCC)

           4.9.1 Definition

           4.9.2 Recognition
           4.9.3 Mechanisms
           4.9.4 Factors Influencing SCC
            Environmental Factors
            Metallurgical Factors
           4.9.5 Prevention and Control

    4.10 Stress Corrosion Cracking of Pipeline Steels

    4.11 Comparison of HIC/SWC, SOHIC, SSC, SZC, HSC, HE and SCC

    4.12 HIC/SOHIC/SSC/HSC/SCC Test Methods

5. Understanding NACE MR0175/ISO 15156

     5.1 Objective
     5.2 Background
            5.2.1 Abbreviated Terms
     5.3 NACE MR0175 / ISO 15156 Interpretation and Maintenance
     5.4 From NACE MR0175 to NACE MR0175/ISO15156
            5.4.1 Significant changes to previous MR0175:
              Responsibilities for Various Users of the Document
              Changes that affect only the Carbon Steel Alloys
              Changes that affect only the Corrosion Resistant Alloys
              Other Options for Material Qualifications
              Requirements for Marking (Part 2, Section 9; Part 3, Section 7)
      5.5 Structure of New Document
             5.5.1 Part 1 - General Principles for Selection of Cracking-Resistant Materials
               Scope of the Standard - Equipment and Component
                                      Design (Section 1)
               Service Conditions: Evaluation and Definition (Section 6)
               Pre-Qualified Materials Selection Guide (Section 7)
               Material Qualification Alternatives and Implementation
               Materials Qualification Documentation (Section 9)
             5.5.2 Part 2: Cracking-Resistant Carbon and Low Alloy Steels
               Scope of the Standard - Equipment and Component Design
               Carbon and Low Alloy Steels in H2S environments (Section 6)
               Qualification and Selection (Section 7)
               Evaluation for resistance to HIC and SWC (Section 8)
               Marking (Section 9)
             5.5.3 Part 3: Cracking-Resistant CRAs and Other Alloys
               Scope of the Standard - Equipment and Component Design
               Corrosion Resistant Alloys in H2S environments (Section 5)
               Qualification and Selection (Section 6)
               Purchasing Information and Marking (Section 7)
    5.6 End User’s Application Guideline for MR0175/ISO 15156
           5.6.1 Select Qualification Method
             Scope of MR0175/ISO 15156
             Existing Facilities vs. New Projects
             Existing Facilities
             New Projects
             Alternative Materials Qualification
            5.6.2 Qualification By Field Experience
              Material Qualification by Field Experience
              Describe and document the materials to be qualified
              Describe and document the service environment
              Compile the Service History for a minimum of 2 years
              Inspection of the in-service material
              Intended Service Environment
              Report and file documentation
             5.6.3 Qualification by Laboratory Testing
               Material Qualification by Laboratory testing
               Select material type and refer to the applicable part
                                     of NACE/ISO standard
               Select the laboratory qualification option that best fits
                                       the application
               Identify the Qualification Required
               Select the Test Method
               Establish the Test Conditions
               Specify the Acceptance Criteria for each test method
               Report the Test Results
   5.7 Other Issues
   5.8 References
   5.9 Questions (175) and interpretations for NACE MR0175/ISO 15156
   5.10 Case Studies


Course Outline |Who Should Attend |Registration |In-House |On-Demand |Online Courses |PPT Slides+Testbank |Course List

Who Should Attend
  • Designers and engineers who are involved in the selection and evaluation of materials for use in H2S-containing environments in oil and gas production.

Successful completion of this corrosion course helps participants prepare for their NACE certification examinations at the Corrosion Technician, Corrosion Technologist and Senior Corrosion Technologist levels.


 Registration for This  Corrosion Course
  • Click here to register for this corrosion course online, or

  • Click here to download this corrosion course brochure with registration form in PDF format.

 In-House Training Corrosion Courses


If you are concerned with corrosion in your business, in-house training is a great solution to train a group of employees from design, production, operation, quality assurance, inspection and maintenance, and technical sales and support on corrosion control and corrosion prevention technology. The contents of all corrosion courses can be customized to fit your organization's needs.


There is no minimum or maximum number of participants required for in-house training corrosion courses. We conduct the in-house training corrosion course at your company's premises and at a time convenient to your company. Requests for in-house training corrosion courses from overseas countries are also welcome.


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 Corrosion Course-On-Demand


All our publicly scheduled corrosion short courses are conducted once a year. However, you do not need to wait for one year if you have missed any of the publicly scheduled corrosion courses as we have this unique corrosion course-on-demand scheme: we will conduct the course just for you on an one-on-one basis at a time and in a location convenient to you. This option costs significantly less than a full-scale in-house training program.


Click here to contact us for a quotation for taking this course as course-on-demand.


 Online and Distance Learning Corrosion Courses

All corrosion courses can be conducted through online or distance learning. An username and password will be emailed to course participants for accessing the online course materials. Alternatively, a CD-ROM containing the same online course material or a master hard copy of corrosion course notes can be sent to your organization. Instructions, course assignments, discussions and questions related to the corrosion courses are posted on the website. Free email support for online courses is provided for a period up to 12 months. A Certificate of Completion will be issued to participants who pass the online test with a score of 70% and above.

Click here to register this corrosion short course for online or distance learning.

 PowerPoint Slides and Test Banks for Trainers, Instructors, Tutors, University Lecturers and Professors


If you are involved in teaching corrosion courses, you may wish to purchase a complete set of PowerPoint slides and the computerized test banks (in MicroTest format) with solutions. These presentations are suitable for teaching corrosion courses at different levels (from undergraduate to postgraduate) and durations (from 6 hrs to 40 hrs). These ready-to-use corrosion PowerPoint slides contain high quality color photographs, illustrations, animations and video clips. They can also be easily edited and customized to your own styles. The corrosion test banks contain over 1,000 corrosion questions for your use in tutorials, tests or examinations. These questions are conveniently grouped into 4 categories in the test bank: (1) true or false, (2) multiple choice, (3) calculation, and (4) reasoning and open-ended discussions).


Click here to contact us if you need more information.


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