Iron Pillar Of Delhi
The Iron Pillar located in Delhi, India, is a 7 m (23 ft) column in the Qutb complex, notable for the rust-resistant composition of the metals used in its construction.
The pillar has attracted the attention of archaeologists and metallurgists and has been called "a testament to the skill of ancient Indian blacksmiths" because of its high resistance to corrosion. The corrosion resistance results from an even layer of crystalline iron hydrogen phosphate forming on the high phosphorus content iron, which serves to protect it, and also the effects of the local Delhi climate, which alternates from wet to dry.
The name of the city of Delhi is thought to be based on a legend associated with the pillar (see History of Delhi).
Other articles related to "iron pillar of delhi, pillar, iron, of delhi, iron pillar":
... The pillar was manufactured by forge welding and is composed of 98% pure wrought iron ... Balasubramaniam of the IIT Kanpur explains how the pillar's resistance to corrosion is due to a passive protective film at the iron-rust interface ... The presence of second-phase particles (slag and unreduced iron oxides) in the microstructure of the iron, that of high amounts of phosphorus in the metal, and the alternate wetting and ...
... Close to the Qutub Minar is one of Delhi's most curious structures, an iron pillar, dating back to 4th century CE ... The pillar bears an inscription which states that it was erected as a flagstaff in honour of the Hindu god Vishnu, and in the memory of Chandragupta II (A derivation of "Natya-darpana ... And after this great feat, he put up this pillar as a memory of the victory) ...
Famous quotes containing the words iron and/or pillar:
“A shadow has fallen upon the scenes so lately lighted by the Allied victory.... From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the Continent.”
—Winston Churchill (18741965)
“Nights, I squat in the cornucopia
Of your left ear, out of the wind,
Counting the red stars and those of plum-color.
The sun rises under the pillar of your tongue.”
—Sylvia Plath (19321963)