TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The metal passivator is phenyl triazole and the derivative, Schiff base and/or organic polycarboxylic acid.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The amidine type compound is N-dodecyl-N,N'-dimethyl ethyl isethionate, N-hexyl-N',N'-dimethyl ethyl isethionate; N-octyl-N',N'-dimethyl ethyl isethionate; N-nonyl-N,N,-dimethyl ethyl isethionate; N-decyl-N,N,-dimethyl ethyl isethionate; N-myristyl-N,N,-dimethyl ethyl isethionate; N-hexadecyl-N',N'-dimethyl ethyl isethionate; N-octodecyl-N',N'-dimethyl ethyl isethionate; N-hexyl-N,N-diethyl isethionate; N-octyl-N,N-diethyl isethionate; N-decyl-N,N-diethyl isethionate; N-dodecyl-N',N'-diethyl isethionate; N-myristyl-N',N'-diethyl isethionate; N-hexadecyl-N,N-diethyl isethionate; N-octodecyl-N,N-diethyl isethionate; N-hexyl-N,N-dimethyl propyl acetamidine; N-octyl-N',N'-dimethyl propyl acetamidine; N-decyl-N',N'-dimethyl propyl acetamidine; N-dodecyl-N',N'-dimethyl propyl acetamidine; N-myristyl-N',N'-dimethyl propyl acetamidine; N-hexadecyl-N',N'-dimethyl propyl acetamidine; N-octodecyl-N',N'-dimethyl propyl acetamidine, 1,8-diazabicyclo(5,4,0) undecane-7-alkene, 1,5-diazabicyclo(4,3,0) nonene-5,1,5,7-tri fold nitrogen double loop(4.4.0) decyl-5-alkene, or 7-methyl-1,5,7-triazabicyclo(4,4,0) decyl-5-alkene. The content of the additive is 50-10000 ppm. The additive further comprises guanidine type compound of formula R9-N(R8)-C(N(R11)(R12))=N-R10 (II). The weight ratio of guanidine type compound of formula (II) and amidine type compound (I) is 1:0.01-1. The guanidine type compound is 1,1,3,3-tetramethyl guanidine, 1,2,3-triphenyl guanidine, 1,3-diphenyl guanidine and 1,1,2,3,3-pentabutyl guanidine. The additive further comprises metal passivator, with weight ratio of amidine type compound and metal passivator of 1:0.01-1. The base diesel comprises other diesel; other diesel is oil diesel, synthesis diesel, hydrocracking biodiesel and/or oxygen-contained diesel; and the volume ratio of biodiesel and other diesel is 1:2-99. The weight ratio of guanidine type (II) and amidine type compound (I) is 1:0.01-1. The guanidine type compound is 1,1,3,3-tetramethyl guanidine, 1,2,3-triphenyl guanidine, 1,3-diphenyl guanidine and 1,1,2,3,3-tetrabutyl guanidine.R8-R12=H or 1-3C alkyl.