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
A smarter view: Airbus looks into the future on the A330 final assembly line with “connected” glasses
Airbus is demonstrating its pioneering spirit to build the world’s...
airbus.com
Australia’s Ferra Engineering to Provide Initial Production for Triton UAS
Northrop Grumman MQ-4C Triton. Photo: Northrop Grumman [Avionics Today 07-31-2015]...
aviationtoday.com
Insitu Wins Contract to Build Six RQ-21A Blackjack UAS for US Navy
RQ-21A Blackjack UAS. Photo: Navair [Avionics Today 07-31-2015] Insitu has...
aviationtoday.com
U.S. National Honors for CH-46 Tomorrow
The Smithsonian National Air and Space Museum will honor the...
aviationtoday.com
Embraer, Bombardier See Delays, Depreciation and Market Softness in Q2
[Avionics Today 07-31-2015] Second quarter 2105 earnings for both biz...
aviationtoday.com
DOT Celebrates 25th Anniversary of ADA
A look at our recent past and a peek into...
faa.gov
Four Corners of the Country
July 30- The July/August 2015 issue of FAA Safety Briefing...
faa.gov
UH-X Order Could Boost 412 Commercial Sales
Japan’s order for 150 military versions of Bell Helicopter’s 412EPI...
aviationtoday.com
Australian Air Force Acquires First Boeing Growler
Amazon’s rendering of a segregated UAS airspace. Photo: Amazon [Avionics...
aviationtoday.com
Northrop Grumman CEO Looks to UAS to Grow Revenues
[Avionics Today 07-29-2015] Northrop Grumman Chief Executive Officer Wesley Bush...
aviationtoday.com
Engility Wins Contract to Support US Air Force GPS
[Avionics Today 07-28-2015] The U.S. Air Force has awarded TASC,...
aviationtoday.com
US Navy Awards Harris Corporation $29 Million Avionics Contract
F/A 18 Super Hornet. Photo: Boeing [Avionics Today 07-28-2015] The...
aviationtoday.com
First Bell 525 Delivery Slated for 2017
The 525 Relentless won’t be delivered to its first operators...
aviationtoday.com
Airbus Helicopters H135 Receives Factory Acceptance for HATS
Airbus Helicopters has achieved Factory Acceptance of HATS01, the first...
aviationtoday.com
Australian Military Training System Approved for Airbus Helicopters H135
Airbus Helicopters has achieved Factory Acceptance of HATS01, the first...
aviationtoday.com
Rockwell Collins Sees Softening Aftermarket Amid Rising Connectivity
Rockwell Collins connectivity segment looks to offset other market softness....
aviationtoday.com
Harris and CPqD to Monitor CNS Systems for Brazilian Air Force ATC
[Avionics Today 07-27-2015] Brazilian Air Force Air Traffic Control (ATC)...
aviationtoday.com
Harris Exec Outlines Electronic Warfare Strategy
Andy Dunn, vice president of business development at Harris. Photo:...
aviationtoday.com
Northrop Grumman Lays Out Fifth Generation C4ISR Framework
[Avionics Today 07-24-2015] Northrop Grumman Corporation has set out a...
aviationtoday.com
New Technologies to Boost Future Military HUD Sales
[Avionics Today 07-24-2015] A new Technavio report on the Head-Up...
aviationtoday.com


Privacy Statement - Copyright Information. - Contact Us

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

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