Answers

2016-03-16T23:34:56+05:30
iron particles are painted so that they may not come in contact with oxygen or water i.e. they may not catch up by rust .

i hope it helps...... 
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2016-03-16T23:51:19+05:30
 Ironarticles are pained to avoid their contact with oxygen which leads to rusting of iron articles.....
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hope it helps........ mark as best