The reason for the dark red color of petroleum road asphalt
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The raw material for petroleum road asphalt is naphthenic heavy oil; I seek analyses from experts in this field
Is the dark red color rust? ? ?
Hello, are our raw materials also pure black, or do they have a slight dark red color as well? You mean the reason for rust is that ferric iron is reddish-brown, right?
Hello, is that because of which metal element in the raw materials?