National Credential
Credential: API 571 Corrosion and Materials
Credentialing Agency: American Petroleum Institute (API)

The American Petroleum Institute (API), 571 Corrosion and Materials credential is an intermediate-level certification recommended for specialized inspectors, corrosion engineers, chemical engineers, and other professionals across the petrochemical industry. To attain the API 571 certification candidates must meet a combination of experiential and educational criteria. Candidates must demonstrate their knowledge of corrosion processes by passing the exam.

More information can be found on the certifying agency's website.

Renewal Period: 3 years

API 571 Corrosion and Materials

The following Army Occupations provide training and/or experience that contributes to attaining this credential:

Personnel Category Occupation Occupation Type Related As Promotion Points Skill Level Star Proponent Funded Gap Analysis
Enlisted 92F Petroleum Supply Specialist MOS other          
Enlisted 92L Petroleum Laboratory Specialist MOS other          
Warrant Officer 923A Petroleum Technician WOMOS other        

Army Table Legend


Related As

The military occupations shown in this table are related to this credential in one of four ways: Most, Some, or Other.

Most: This credential is directly related to most of the major duties associated with the military occupation (at least 80%). Note that the credential may require additional education, training or experience before you are eligible for it.

Some: This credential is related to some tasks associated with the duties of the military occupation (related 80% to at least one or more critical tasks but less than 80% of all of the entire military occupation). Note that the credential may require additional education, training or experience before you are eligible for it.

Other: This credential is related to this military occupation, but is more advanced or specialized and therefore will likely require additional education, training, or experience.

Promotion Points Promotion Points icon

This credential has been approved for promotion points for this MOS towards promotion to Sergeant and Staff Sergeant. Clicking the Promotion Points icon will open a link to the promotion points fact sheet.

Skill Level Designation

Skill Level I: This skill level consists of all Soldiers in the ranks of Private (pay grade E-1) up to Specialist (pay grade E-4). Time in Service (TIS) is generally between initial entry and four Years of Service (YOS). This skill level is Entry-level positions requiring performance of tasks under direct supervision.

Institutional training:

  • Structured Self-Development (SSD) level I
  • Basic Leader Course (BLC)

Skill Level II: This skill level is obtained when promoted to Sergeant (paygrade E-5). TIS is generally between 4-8 YOS. Positions requiring performance of more difficult tasks under general supervision; and in some instances, involving supervision of Soldiers in SL1.

Institutional training:

  • Structured Self-Development (SSD) level II
  • Advance Leader Course (ALC)

Skill Level III: This skill level is obtained when promoted to Staff Sergeant (paygrade E-6). TIS is generally between 8-12 YOS. Positions requiring performance of still more difficult tasks and involving first line supervision of Soldiers in SL1 & SL2.

Institutional training:

  • Senior Leader Course (SLC)
  • Structured Self-Development (SSD) level III

Skill level IV: This skill level is obtained when promoted to the rank of Sergeant First Class (paygrade E-7). TIS is generally between 12-18 YOS. Positions requiring relatively detailed knowledge of all tasks specified for a given MOS, normally involving first-line supervision of Soldiers in SLs 1, 2, and 3, and involving managerial duties.

Institutional training:

  • Master Leader Course (MLC)
  • Structured Self-Development (SSD) level IV
  • Senior Enlisted Joint Professional Military Education (SEJPME) I Course

Skill level V: This skill level is obtained when promoted to the rank of Master Sergeant (paygrade E-8). TIS is generally between 18-22 YOS. Positions requiring direct and indirect leadership roles with expertise in company and battalion-level operations and competency across a given CMF, serving as members of a staff at every level in the Army, with a full understanding of the allocation of resources and their utilization in order to accomplish Army functions and missions.

Institutional training:

  • United States Army Sergeants Major Academy (USASMA)
  • Structured Self-Development (SSD) level V

Skill level VI: This skill level is obtained when promoted to the rank of Sergeants Major (paygrade E-9). TIS is generally between 22-30 YOS. Positions requiring organizational leadership roles with multi-dimensional expertise in units and teams on division, corps, and Army staffs, integrated with Joint, Interagency, Intergovernmental, and Multinational (JIIM) partners with a full understanding of the Force Generation process, operations at all echelons, and how the Army runs.

Star Credential Star icon

Star credentials are MOS enhancing, as designated by the Proponent. MOS enhancing credentials are directly related to an MOS or ASI, are taught either partially or completely as part of a Program of Instruction (POI), and improve the MOS technical proficiency.

Proponent Funded Funded icon

This icon indicates credentials which Soldiers may have funded through their MOS proponent. Some proponents offer credentialing opportunities in conjunction with military training and/or as part of MOS development beyond the training base.

Gap Analysis Has Analysis icon

A detailed analysis comparing the credential requirements to the military occupation has been completed. Click on the gap analysis icon to view the analysis page.

API 571 Corrosion and Materials

Eligibility Requirements ()

Note: This credential may have multiple options for becoming eligible. Listed below are the minimum requirements based on the minimum degree required. To view other options, see the Eligibility tab.

  • Credential Prerequisite: (optional) API 510, 570 or 653 certification
  • Experience: 5 years
  • Education
  • Training
  • Membership
  • Other
  • Fee

Exam Requirements ()

  • Written Exam
  • Oral Exam
  • Practical Exam
  • Performance Assessment

Renewal Period: 3 years

  • Continuing Education
  • Exam
  • Continuing Education OR Exam
  • Fee
  • Other

American Petroleum Institute (API)
1220 L Street, NW
Washington, DC  20005-4070
Phone: (202) 682-8000
Contact Page

API 571 Corrosion and Materials

Option 1: Candidates with no formal education and 5 years of experience in the petrochemical industry are eligible to apply for the API 571 certification.

Option 2: Candidates with a High school diploma or equivalent and 3 years of experience in the petrochemical industry are eligible to apply for the API 571 certification.

Option 3: Candidates with a two-year technical degree and 2 years of experience in the petrochemical industry are eligible to apply for the API 571 certification.

Option 4: Candidates with a BS or higher in engineering and 1 year of experience in the petrochemical industry are eligible to apply for the API 571 certification.

API 571 Corrosion and Materials

  • Scope
  • Organization and Use
  • References
  • Definitions of Terms
  • Technical Inquires
  • Standards
  • Other References
  • Symbols and Abbreviations
  • Mechanical and Metallurgical Failure Mechanisms
  • Uniform or Localized Loss of Thickness
  • High Temperature Corrosion (>400 degrees F [204 degrees C])
  • Environment - Assisted Cracking
  • Process Unit PFDs

There are a number of resources available to help you prepare for the API 571 Corrosion and Materials examination:

An additional resource is Safari Books Online, a searchable digital library that provides online access to thousands of books, training videos and conference sessions. See the Educational Resources page here on COOL to learn how to get free access.

Testing for this credential is handled by Prometric. The test centers are located in the U.S.

To find out more, use the following links on the Prometric website:

For more information on the American Petroleum Institute (API) testing process, visit the agency website.

API 571 Corrosion and Materials

Renewal Period: 3 years

The API 571 Corrosion and Materials credential has the following recertification information: