Copper Corrosion by Atmospheric Pollutants in the Electronics Industry

Table 3

Correlation of corrosion rate, the year season, and air pollutants in indoor conditions of industrial plants.

Seasons	Climatic factors
	Hydrogen sulfide (H2S)				Sulfur dioxide (SO2)
	RH^a	𝑇^b	𝐶^c	CR^d	RH^a	𝑇^b	𝐶^c	CR^d
Spring
Max	88.8	33.4	0.15	255	85.6	23.2	0.34	176
Min	34.5	17.6	0.09	130	46.7	15.1	0.23	112
Summer
Max	89.9	42.1	0.14	265	88.2	39.9	0.45	245
Min	38.5	24.3	0.11	181	42.3	28.2	0.18	114
Winter
Max	87.5	25.6	0.42	382	88.8	22.3	0.67	338
Min	43.2	17.8	0.26	245	38.9	12.3	0.25	136

aRH: relative humidity, %, ^b𝑇: temperature, °C, ^c𝐶: air pollution concentration (C), ppm, and ^dCR: corrosion rate, mg/m²·year.