Quantcast Clad Aluminum Surfaces

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
205.200 Figure 4-26.—Hinge corrosion points. structures in avionic equipment, and the skin of the aircraft. Because of its wide use, you must be able to recognize and take the proper corrective action whenever corrosion is detected or suspected. Aluminum and its alloys are subject to a wide range of corrosive attack, varying from general etching of the surfaces to penetrating attacks along the internal grain boundaries of the metal. The corrosion products (fig. 4-27) appear as white-to-gray powdery deposits that have greater volume than the original metal. In its early stages, aluminum corrosion is evident as a general etching, pitting, or roughness of the surface. The surface attack progresses quite slowly at first; however, the attack will accelerate if the corroding material is not given immediate attention. Paint coatings mask evidence of corrosion, but because the corrosion products have a greater volume, corrosion will show up as blisters, flakes, chips, lumps, or other irregularities in the paint coating. Often, white or gray streaks of corrosion products become readily apparent at breaks in the paint film. Maintenance personnel should investigate such signs further to determine the extent that corrosion has progressed. There are three types of aluminum surfaces insofar as corrosion removal is concerned. They are clad, anodized, and exfoliated aluminum surfaces. Clad Aluminum Surfaces. Pure aluminum has considerable corrosion resistance compared to aluminum alloys. but it has little or no structural strength. An extremely thin sheet of pure aluminum laminated onto each side of an aluminum alloy sheet improves the corrosion resistance with little impairment of strength. The trade name of this aluminum laminate, as originated by the Aluminum Company of America, is Alcad. From this trade name the adjective clad and the verb cladding have been derived. An example of clad aluminum is the surface of unpainted aircraft. Not all aircraft sheet aluminum is clad, especially those alloy sheets from which small brackets, gussets, and fittings are made. The pure aluminum is very soft, and fabrication processes would severely damage or destroy the clad surfaces. To remove corrosion from clad surfaces, the corroded areas should be hand polished with MIL-P-6888 metal polish. It effectively removes stains and produces a high-gloss, lasting polish on unpainted clad surfaces. During the polishing operation, you should take care to avoid mechanical 4-36



Aviation News
Fleets serving Australia South Pacific to almost double by 2033
Strong economies, tourism and propensity to travel driving growth Share...
airbus.com
10 years in the skies: the A380’s numbers add up
Wherever it flies, the A380 continues to be an impressive...
airbus.com
US Air Force Grants Lockheed Martin $80 Million C-130 Contract
U.S. aircraft C-130E Hercules. Photo: U.S. Air Force photo by...
aviationtoday.com
Mexican Air Force Receives Avionics Upgraded C-130K
Cockpit of a Mexican C-130K. Photo: Rockwell Collins [Avionics Today...
aviationtoday.com
Rockwell Collins Revenue Surpasses Expectations as CEO Turns to IMS Expansion
Rockwell Collins CEO Kelly Ortberg. Photo: Rockwell Collins [Avionics Today 04-24-2015] With...
aviationtoday.com
Airbus Selects Korean Air Aerospace to manufacture Sharklet wingtips for the A330neo Family
• Building on KAL-ASD’s experience with manufacturing Sharklets for the...
airbus.com
Airbus team making vital contributions to America’s Cup champion
New wave in Airbus and ORACLE TEAM USA partnership Share...
airbus.com
Northrop Grumman, US Navy UAS Makes In-Flight Refueling a Reality
The X-47B Unmanned Combat Air System Demonstration aircraft. Photo: Northrop...
aviationtoday.com
Presagis Acquisition Opens Door to Airframe, Avionics Software Collaboration
Presagis avionics design software. Photo: Presagis [Avionics Today 04-23-2015] Presagis,...
aviationtoday.com
Army to Brief DVE Solution Options Next Week
U.S. Army aviation officials will brief their analysis of alternatives...
aviationtoday.com
Exelis Launches Situational Awareness Tool for UAS
Exelis’ new application improves UAS situational awareness. Photo: Exelis [Avionics...
aviationtoday.com
easyJet takes delivery of its 250th Airbus aircraft
Europe's and one of the world's biggest A320 family airlines...
airbus.com
Draken International Offers Upgrades on L-39 Aircraft
[Avionics Today 04-22-2015] Florida-based Maintenance, Repair and Overhaul (MRO) company...
aviationtoday.com
GAO Report Sees Snags in Future F-35 Affordability
[Avionics Today 04-22-2015] The Department of Defense (DOD) and industry...
aviationtoday.com
Airbus, FlightSafety International’s U.S. Partnership to Help Address Future Commercial Pilot Shortage
The Airbus Training Center (ATC) in Miami, Florida has signed...
airbus.com
Airbus Helicopters' H225M Pre-Selected by Poland
Airbus Helicopters and its partner Heli Invest Services have welcomed...
aviationtoday.com
Lockheed Martin Sees Aircraft Production Decline in Q1
Photo: Mark Doliner (flickr) [Avionics Today 04-21-2015] Lockheed Martin reported...
aviationtoday.com
Raytheon Wins FAA Contract to Field Satellite Payload, Improve GPS Accuracy
[Avionics Today 04-21-2015] Raytheon Company has received a $103 million...
aviationtoday.com
Airbus Defense and Space Focuses C212 Support in Mobile, Alabama
Juan Uriarte, head of Airbus Defense and Space U.S. military...
aviationtoday.com
Over 1,500 orders for the versatile A330
Growing market endorsement for most popular widebody aircraft Share this...
airbus.com


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +