AMPP CCI-2 flashcards
AMPP CCI-2 · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- White metal blast
- Surface preparation grade SSPC-SP 5/NACE No. 1 in which all visible oil, grease, dirt, mill scale, rust, coating, and oxide are removed, leaving a uniform gray-white finish.
- Near-white blast
- SSPC-SP 10/NACE No. 2 grade allowing at least 95% of each unit area free of visible residues, with staining limited to less than 5% of the area.
- Commercial blast
- SSPC-SP 6/NACE No. 3 grade requiring at least two-thirds of each unit area free of visible residues, permitting staining on the remaining one-third.
- Dew point margin
- Surface temperature must exceed the dew point by at least 3 °C (5 °F) before and during surface preparation and coating application to prevent condensation.
- Blast profile measurement
- Surface roughness after abrasive blasting is measured with replica tape or a profilometer; typical epoxy target is 1.5-3.5 mil (38-89 µm).
- Soluble salt testing
- Chloride and other soluble salts are measured by Bresle patch conductivity or test kits; excessive salts cause osmotic blistering and premature coating failure.
- Relative humidity limit
- Most coating specifications set a maximum relative humidity near 85%, and application is stopped when RH or surface temperature approaches the dew point.
- Wet film thickness comb
- A notched comb gauge pressed into freshly applied coating; the highest notch that wets the coating indicates WFT, which converts to DFT via volume solids.
- DFT from WFT
- Dry film thickness equals wet film thickness multiplied by percent volume solids; for example, 8 mil WFT at 60% solids yields 4.8 mil DFT.
- SSPC-PA 2 rule
- For a 5-mil system, every gauge reading must be at least 80% of specification and the average at least 100%, with no reading exceeding the maximum.
- Holiday detection
- Low-voltage wet-sponge testing suits thin films; high-voltage spark testing suits thicker or non-conductive coatings, with voltage set according to film thickness.
- Pull-off adhesion test
- ASTM D4541 test using a bonded dolly pulled from the coating; result reports stress at failure and failure mode, and the test site must be repaired.
- Cross-cut adhesion
- ASTM D3359 tape test where a lattice pattern is cut into the film and tape is applied; adhesion is rated by the amount of coating removed.
- Stripe coat
- A brush-applied coat on welds, edges, corners, and fasteners before full spray application to ensure adequate film build at difficult geometry.
- Recoat interval
- The manufacturer-specified minimum and maximum time between coats; exceeding the maximum may require surface abrasion to restore intercoat adhesion.
- Gauge calibration check
- DFT gauges are verified on certified shims before and after use; current calibration records must be traceable to a recognized standard.
- Volume solids
- The percentage of a coating that remains as dry film after solvent evaporation; it determines the wet-to-dry film relationship and theoretical spread rate.
- Theoretical spread rate
- Spread rate in square feet per gallon equals 1604 times volume solids percent divided by dry film thickness in mils.
- Zinc-rich primer
- A primer with high zinc dust content, typically over 80% by weight in the dry film, providing galvanic cathodic protection to steel.
- Epoxy mid-coat
- A coating offering excellent barrier and chemical resistance and strong adhesion; it chalks and yellows under UV and needs a UV-stable topcoat outdoors.
- Polyurethane topcoat
- A UV-stable finish with good gloss and color retention used over epoxy mid-coats for exterior exposure and aesthetic performance.
- Polysiloxane topcoat
- A UV-stable, high-build topcoat capable of achieving a durable finish in fewer coats, often used in severe exterior environments.
- ISO 12944 corrosivity
- A classification of atmospheric corrosivity categories C1 through C5 and immersion categories used to select coating systems by service environment.
- Coating specification content
- A document defining surface preparation standard, coating system, DFT ranges, environmental limits, and inspection hold points, citing governing standards by number and edition.
- Inspection report content
- A factual, contemporaneous record including date, time, location, ambient conditions, instrument readings, observations, and the inspector's identity and signature.
- Nonconformance report
- A document recording a deviation from specification with objective evidence, disposition, and corrective action tracking until closure.
- Hold point
- A step in the inspection and test plan where work may not proceed until the inspector has performed the required inspection and signed off.
- Witness point
- A step in the inspection and test plan that the inspector may observe but that does not stop work if the inspector is absent.
- Inspector ethics
- Independence, avoidance of conflicts of interest, reporting only observed facts, and refusal to sign for work not personally inspected or verified.
- Specification conflict rule
- When documents conflict, the contract-specified hierarchy or the more stringent requirement governs; the conflict and its resolution must be documented.
- Standard citation
- Referenced standards such as SSPC, NACE/AMPP, ASTM, and ISO are cited by full designation and year; superseded editions must be identified.
- Record correction method
- Corrections on inspection records are made by a single-line strike-through with initials and date; erasure or overwriting is not permitted.