Seagate ST910021AS manual 2.16, Corrosive environment, 表示该部件（于同类物品程度上）所含的危险和有毒物质超出中国, RoHS MCV

"X" indicates the hazardous and toxic substance content of the part (at the homogenous material level) is over the threshold defined by the China RoHS MCV Standard.

X "	表示该部件（于同类物品程度上）所含的危险和有毒物质超出中国	RoHS MCV
2.16		标准所定义的门槛值。
	Corrosive environment

Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM B845. However, this accelerated testing cannot duplicate every potential application environment.

Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corro- sive chemicals as electronic drive component reliability can be affected by the installation environment. The sil- ver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulca- nized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any “electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.

Momentus 7200.1 SATA Product Manual, Rev. B 17