The most current official version of this standard is NACE SP0170-2018
Field engineers can now reference the standard on tablets during a turnaround. If a question arises about the required alkaline solution concentration for a specific vessel, the answer is a search bar away. This immediacy is vital; in a shutdown scenario, delays cost millions of dollars per day, and cutting corners on corrosion prevention can cost lives. nace sp0170 pdf 2021
Do not rely on a bootleg copy from a forum. Purchase the official PDF from AMPP, read it cover to cover, and integrate its requirements into your material selection and quality assurance workflows. In the sour service arena, the standard is not a suggestion—it is the law of physics, enforced by the potential for catastrophic failure. The most current official version of this standard
| Parameter | Requirement (2021) | |-----------|--------------------| | | ≥ 99.5% Zn (per ASTM B833) | | Thickness (typical) | 250–500 µm (10–20 mils) | | Bond strength | ≥ 1.5 MPa (pull-off test) | | Porosity | ≤ 5% (image analysis or ferroxyl test) | | Electrical continuity | < 2 ohms between segments | | Current density | 5–20 mA/m² of anode surface | Do not rely on a bootleg copy from a forum