A zinc coating, usually hot-dipped, in which the zinc and steel form a metallurgical bond. The thickness of a hot-dipped coating can be varied from a thin zinc/iron alloy layer to heavy applications suitable for extended outdoor exposure.
Humid subtropical climate. In Africa, the humid subtropical climates are found in two separate areas on the southern hemisphere of the continent. The Cwa climate is found over a large portion of the interior of the Middle and Eastern African regions.
While those parts of the tropics such as coastal West Africa, west-central Africa, and southern India get abundant rainfall, there is also an arid zone extending across northern Africa (the Sahara) and northwest India, and another arid zone in southwestern Africa.. The tropical zone falls between the Tropic of Cancer in the north and the Tropic of Capricorn in the south. The Afro-Asian tropics have a cycle of rainy and dry seasons dictated by the alternating winds known as monsoons.