Hard Chrome Plating Training Course
Appendix 2. Acronyms and Abbreviations
AC | alternating current |
ACGIH | American Conference of Governmental Hygienists |
AESF | American Electroplaters and Surface Finishers Society |
Al | aluminum |
amps | amperes |
AMS | Aerospace Material Specification |
APSI | amps per square inch |
ASTM | American Society for Testing and Materials |
Avg | average |
Be° | degrees Baumé |
CD | current density |
cfm | cubic feet per minute |
Cl– | chloride |
Cr | chromium |
Cr III | trivalent chromium |
Cr VI | hexavalent chromium |
Cr+3 | trivalent chromium |
Cr+6 | hexavalent chromium |
Cr0 | metallic chromium |
CrO3 | chromium trioxide |
Cu | copper |
d | day |
d | diameter |
DC | direct current |
DI | deionized |
dynes/cm | dynes per centimeter |
e– | electron |
EPA | U.S. Environmental Protection Agency |
F | fluoride ion |
Fe | iron |
ft | feet |
ft2 | square feet |
ft3 | cubic feet |
g | grams |
g/L | grams per liter |
gal | gallons |
gpd | gallons per day |
gpm | gallons per minute |
h | height |
H2 | hydrogen |
H2SO4 | sulfuric acid |
HCl | hydrochloric acid |
hp | horse power |
hr | hour |
ID | inside diameter |
In | inches |
in3 | cubic inches |
kg | kilogram |
kW | kilowatt |
kWh | kilowatt-hour |
L | liter |
L | length |
lb | pound |
lbs | pounds |
MC | methylene chloride |
mg | milligram |
mg/L | milligrams per liter |
mil | thousandth of an inch |
min | minute |
mth | month |
NESHAP | National Emissions Standards for Hazardous Air Pollutants |
O&M | operating and maintenance |
O2 | oxygen |
°C | degrees centigrade |
OD | outside diameter |
OEM | original equipment manufacturer |
°F | degrees fahrenheit |
OSHA | U.S. Occupational Safety & Health Administration |
oz | ounce |
oz/gal | ounce per gallon |
P2 | pollution prevention |
PEL | permissible exposure limit |
PERC | perchloroethylene |
ph | phase |
ppm | parts per million |
psi | pound per square inch |
PTFE | polytetrafluoroethylene |
PVC | polyvinyl chloride |
r | radius |
RCRA | Resource Conservation and Recovery Act |
RFIE | reciprocating flow ion exchange |
rpm | revolutions per minute |
SCR | silicon controlled rectifier |
sec | seconds |
SO4 | sulfate |
SS | stainless steel |
TCE | trichloroethylene |
TDS | total dissolved solids |
TLV | threshold limit value |
TSS | total suspended solids |
U | heat transfer coefficient |
V | volts |
VDC | volts direct current |
W | width |
wk | week |
WR-ALC | Warner Robins Air Logistics Center |
yr | year |
Zn | zinc |
- | negative pole |
% | percent |
" | inch or inches |
+ | positive pole |
< | less than |
> | greater than |
µ | micron |
µ/hr | microns per hour |