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.
Tropical Moist (Group A) climates are found in a band about 15Â° to 25Â° N and S of the equator (Figure 17.8). Intense sunshine means that the tropics are warm year-round: each month has an average temperature of at least 18Â°C (64Â°F). Rainfall is abundantâat least 150 cm (59 inches) per year.he tropical monsoon climate resembles the tropical wet biome (Af) but has very low precipitation for one to two months each year. During these months, less than 6 cm (2.4 inches) of rain falls. Rainforests can grow here because the dry period is short, and the trees can be supported by moisture trapped in the soil.