NALCOMIS
What publication is used for SE cleaning, preservation and corrosion control?
17-1-125
What type of corrosion results from a direct chemical attack on a metal surface that proceeds uniformly over the entire exposed surface and involves only the metal surface?
Uniform Surface Corrosion.
What is a Sealant?
Sealants are a spray-, brush-, or spatula-applied compounds to prevent corrosion or to exclude water.
Chapter ___ deals with the Preservation and Depreservation of Support Equipment (SE)?
11
How many chapters are there in the corrosion pub?
11
What WUC is used on a CP MAF.
040
Pitting Corrosion is most common on?
Aluminum and magnesium alloys.
What type of sealant is general purpose and is used for SE and fuel tanks?
AMS-S-83318
Who is responsible for determining and ensuring that the appropriate pieces of SE are placed in preservation?
Maintenance Officer
What is the difference between an Anode and a Cathode metal?
Anode- High Corrosion Potential ie: Lithium, Magnesium alloys, aluminum alloys, etc.
Cathode- Low Corrosion Potential ie: Titanium alloys, Gold, Silver, etc.
What WUC is used on a CT MAF?
The specific WUC of the item being processed.
Corrosion Fatigue occurs in how many stages?
2- 1: The combined action of corrosion and cyclic stress damages the metal by pitting and forming cracks in the pitted area. 2: The continuation of crack propagation, in which the rate of cracking is controlled by; stress concentration in the main cross-section, physical properties of the metal, and the presence of corrosion products in the crack face.
How many adhesion promoters are there (according to the pub)
1
AMS 3100- Adhesion promoter for poly sulfide sealing compounds
Removing all barrier materials and removing all corrosion-preventive compounds with cleaning solution iaw Ch3 is called what?
Depreservation
How many paint application methods are there?
5
(Brush, Air Spray, Roller, Aerosol, Touch-up pen)
"PERFORM CORROSION PREVENTION ON T-15. COMPLY WITH NA 17-1-125."
What would be the corrective action?
"PERFORMED CORROSION PREVENTION ON T-15 IAW NA 17-1-125. T-15 IS CLEAN AND CERTIFIED FOD/CORROSION FREE. PEMA _____/ NATEC UTILIZED."
What are the 3 general types of crevice corrosion?
-Metal Ion concentration cells
- Oxygen concentration cells
- Active-passive cells
What type of Component Sealants are there?
One Component and Two Component Sealants.
In static dehumidfication desiccant is used to keep the humidity below ___% in the area being preserved?
40%
How many Degrees of Corrosion are there and what are they?
3
Light Corrosion, Moderate Corrosion, Severe Corrosion.
What is the Trans Cd and Act taken on both a CP and CT
CP: Trans Cd: 11 Act Taken: 0
CT: Trans Cd: 11 Act Taken: Z
How many different types of Corrosion are there?
12
Uniform Surface, Galvanic, Pitting, Intergranular, Exfoliation, Crevice, Stress Corrosion Cracking, Hydrogen Embrittlement, Corrosion Fatigue, Filiform, Fretting, and Erosion.
How many Component Sealants are there?
6
4- Two Component Sealants: AMS-2-83318, MIL-PRF-81733 Class 1, AMS-S-8802, AMS 3277
2- One Component Sealants: MIL-A-46146, AMS-S-4383
How many levels of preservation for aircraft are there AND how long are they?
Level l: 0 - 90 day (+/- 3 days)
Level ll: 0 - 1 year
Level lll: 0 - indefinite
Paint colors are identified by using a ____________ numbering system.
5-digit.
The first digit describes gloss; 1/high gloss, 2/semi gloss, 3/ flat. The remaining 4 numbers describe the color.