कुतुब परिसर में स्थित लौह स्तम्भ |
संस्कृत में अंकित कुछ वाक्य |
ऐसा माना जाता है कि तोमर-साम्राज्य के राजा विग्रह ने यह स्तम्भ कुतुब परिसर में लगवाया। लौह स्तम्भ पर लिखी हुई एक पंक्ति में सन 1052 के तोमर राजा अनन्गपाल (द्वितीय) का जिक्र है।
सन 1997 में पर्यटकों के द्वारा इस स्तम्भ को नुकसान पहुँचाने के पश्चात इसके चारों ओर लोहे का गेट लगा दिया गया है।
इस लौह स्तम्भ की खास बात यह है कि इसमें कभी ज़ंग नहीं लगा है। एक आम लोहा बारिश, सर्दी व गर्मी की लगातार बदलती ऋतुओं के कारण आसानी से ज़ंग खा जाता है किन्तु इसे हमारे इतिहास के बेहतरीन कारीगर व वैज्ञानिक क्षमता का उदाहरण ही कहा जायेगा कि यह लौह स्तम्भ आज विश्व में शोध का विषय बन गया है।
पंडित बाँकेराय द्वारा संस्कृत से किया गया अंग्रेज़ी अनुवाद |
In a report published in the journal Current Science, R. 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 drying existing under atmospheric conditions are the three main factors in the three-stage formation of that protective passive film.[1
Lepidocrocite and goethite are the first amorphous iron oxyhydroxides that appear upon oxidation of iron. High corrosion rates are initially observed. Then, an essential chemical reaction intervenes: slag and unreduced iron oxides (second phase particles) in the iron microstructure alter the polarization characteristics and enrich the metal–scale interface with phosphorus, thus indirectly promoting passivation of the iron[14] (cessation of rusting activity)
The next main agent to intervene in protection from oxidation is phosphorus, enhanced at the metal–scale interface by the same chemical interaction previously described between the slags and the metal. The ancient Indian smiths did not add lime to their furnaces
The most critical corrosion-resistance agent is iron hydrogen phosphate hydrate (FePO4-H3PO4-4H2O) under its crystalline form and building up as a thin layer next to the interface between metal and rust. Rust initially contains iron oxide/oxyhydroxides in their amorphous forms. Due to the initial corrosion of metal, there is more phosphorus at the metal–scale interface than in the bulk of the metal. Alternate environmental wetting and drying cycles provide the moisture for phosphoric-acid formation. Over time, the amorphous phosphate is precipitated into its crystalline form (the latter being therefore an indicator of old age, as this precipitation is a rather slow happening). The crystalline phosphate eventually forms a continuous layer next to the metal, which results in an excellent corrosion resistance layer.[17] In 1,600 years, the film has grown just one-twentieth of a millimetre thick.[18]
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10 comments:
its good
Thank you 😊 for this important information.
Its very good qutub meenar
it's amazing this information is briliant.
it's amazing this information is briliant.
Very nice qutub minar
The iron piller is indian history's most part so please anyone can explained.
Amazing and unique information. Thanks
This pillar was designed and constructed by Varahmihir in Vikramaditya era.
such a intresting fact of our past
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