Copper Corrosion by Atmospheric Pollutants in the Electronics Industry

Table 2

Relation of concentration of air pollutants and climate factors in Mexicali.

Seasons	Climatic factors
	Sulfur dioxide (SO2)			Carbon monoxide (CO)			Nitrogen oxides (NO𝑋)			Ozone (O3)
	RH^a	𝑇^b	𝐶^c	RH^a	𝑇^b	𝐶^c	RH^a	𝑇^b	𝐶^c	RH^a	𝑇^b	𝐶^c
Spring
Max	49.3	34.8	0.16	39.1	29.3	69	34.3	28.6	0.48	48.3	27.3	0.21
Min	23.3	20.4	0.08	28.6	22.1	4	29.8	19.9	0.01	28.5	15.2	0.06
Summer
Max	83.8	45.9	0.11	73.9	45.9	57	70.8	39.9	0.54	73.2	44.5	0.37
Min	46.1	23.6	0.03	47.5	29.2	16	44.7	22.4	0.18	44.3	26.5	0.01
Winter
Max	77.8	27.4	0.50	72.8	24.7	84	69.1	24.6	0.75	87.9	27.7	0.51
Min	16.6	17.8	0.17	39.3	23.9	6	63.2	13.8	0.17	47.2	28.8	0.05

aRH: relative humidity, %, ^b𝑇: temperature, °C, and ^c𝐶: air pollution concentration (C), ppm.