Protection ships

Cathodic Protection This electrochemical method of corrosion control has found wide application in the protection of carbon steel underground structures such as pipe lines and tanks from external soil corrosion. It is also widely used in water systems to protect ship hulls, offshore structures, and water-storage tanks. 

Armored Ships. The necessity of protecting ships by some kind of armor was realized after the introduction of HE shells in sea warfare (ca 1849), and introduction of AP shells at a later date. The first ship protected by armor was La Gloire the French wooden ship, dressed in 1859 in iron plates. Two years later, the British launched the 9000-ton Warrior with 4/4" thick iron plates all around and 6 ft below the waterline... 

Insects also produce polymers. For example, silk is made by a caterpillar called a silkworm. One silkworms cocoon can contain as much as 900 to 3,000 feet (300 to 900 m) of silk thread. An insect called the Laccifer lacca—or just Lac, for short—lives on trees in India and Southeast Asia. The insects drink the sap from the trees they are living on and produce a polymer that is used to make lacquer and shellac. People use these varnishes to coat and protect ships, houses, wood floors, furniture, and other objects made of wood. 

Me>,NC(Sj- H NO Additives for anti-foulmg paint protecting ship hulls 196. 545... 

Figure 7-9 What happens on a non-protected ship protected ship - current method...

Special attention should be given to the design, use, cleaning and maintenance of all equipment used for the handling of pharmaceutical products which are not in a protective shipping carton or case. 

No battledress, of any variety, was of value in protecting ships from magnetic mines for they distinguished neither friend nor foe. Hiding behind camouflage or displaying hospital ship or neutrality colours made no difference. 

New, environmentally friendly marine antifoulants protect ships without polluting the water. 

The marine environment presents a hostile and seemingly unlikely situation for the survival of archaeological wood, yet it does survive. Normally, wood does not survive long enough in marine environments to enter the archaeological record because of the activities of wood-boring animals and aerobic microbes. However, studies have shown that rapid burial in the anoxic sediments of the seabed will protect ships timbers and wooden artefacts from the physical, chemical and biological processes that influence the deterioration of exposed wood. 

Figure 10.28 Cathodic disbonding of a paint coating on a cathodically protected ship hull.

Anodes may be installed to protect ships tanks and holds while these receptacles are filled with seawater ballast. The anodes remain when the tank is in use, and zinc is particularly safe for such applications because it does not produce hydrogen gas or thermite sparks when struck with steel. 

Safe access/egress, heat protection, slippage and faU protection Ship, rail car, or truck traffic flow arrangements, inspection and waiting... 

The use of sacrificial anodes to protect ship hulls has become less favored than impressed current techniques, but it is still foimd on smaller vessels, where the impressed current method is uneconomical. Zinc is the most common anode material for seawater applications while aluminum and magnesium provide a higher voltage for less... 

Cafhode object to be protected (ships hull, buried tank or pipeline, offshore structure etc)... 

Packaging, storage Protection, shipping Fruit, vegetables, flowers Compressibihty, thickness... 

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