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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 |
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The information contained in this site is provided for your review and convenience. It is not intended to provide legal advice with respect to any federal, state, or local regulation.
You should consult with legal counsel and appropriate authorities before interpreting any regulations or undertaking any specific course of action.
Please note that many of the regulatory discussions on STERC refer to federal regulations. In many cases, states or local governments have promulgated relevant rules and standards
that are different and/or more stringent than the federal regulations. Therefore, to assure full compliance, you should investigate and comply with all applicable federal, state and local regulations.