Touch-up and field repair use. TCP-HF contains a small amount of trivalent chrome which is not a carcinogen and is non-toxic. Disposal of hexavalent chrome is more expensive. Hexavalent chrome must be reduced to a trivalent state where the converted trivalent chrome content is precipitated and removed as a non-toxic substance.
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PAGE 1 1. Approved for public release; distribution is unlimited. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents that are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation see 6.
The material, when furnished in the form specified in 1. The applicator pen solution shall not be permitted to puddle. After panel repair and immersion specified in 4. There shall be no blistering of the unscribed coated area. Three, 3 x 10 x 0. The panels shall then be marked with a pencil line 4 inches from one end. Each clean, marked panel shall be placed in a separate ml beaker and weighed with the beaker to the nearest tenth of a gram. All panels shall be dried at ambient conditions for 24 hours before finishing or testing.
Panels marked 1 through 5 shall have edges protected by wax or other standard method. The A and B lettered panels numbered 7 through 29 in accordance with 4. Panels shall be air dried for 14 days before testing. All other panels — Panels shall be finished as specified in 4. Unless otherwise specified, the time of periodic verification by certification shall be in two-year intervals from the date of the original qualification, and shall be initiated by the qualifying activity.
No change shall be made in formulation, raw materials or supplier s of raw materials, methods of manufacture, equipment, or geographic location without prior written Government approval. The Government reserves the right to re-examine the qualified product whenever deemed necessary to determine that the product continues to meet any or all of the specification requirements.
In addition to the other tests required for class 1A materials, Form IV and Form V shall be tested for ability to adhere to a vertical surface as specified in 3. One quart of the Form IV or Form V material with required water added shall be thoroughly mixed and allowed to stand for 24 hours.
Transfer enough of the material to almost fill a ml plastic beaker. Each previously prepared panel, in accordance with 4. The panel shall then be transferred without rinsing to the beaker in which it was originally weighed and the beaker and the coated panel shall be re-weighed to the nearest tenth of a gram. The weight of material clinging to the panel is equal to the original weight of the panel plus the beaker subtracted from the weight of the panel plus the coating plus the beaker.
Average weight determined from the three tests shall conform to 3. Panels 12 through 29 finished as specified in 4.
The remainder of the topcoat shall be lightly abraded to accept refinish primer. The abraded area shall be 4 square inches. The entire surface of panels 12 through 20 and 21 through 29 shall be refinished as specified in the appropriate section of 4. Painted panels shall be immersed in distilled water as follows: 3 panels of each substrate and finish for 24 hours at room temperature. Upon completion of the immersion period, the panels shall be removed from the water, dried using a clean, dry soft cloth, and be immediately evaluated as specified in 4.
All incisions shall be into the substrate. The scribed area shall include the original paint, overlap area, and the repair area. The tape, 3M Type see 6.
The incision areas shall be inspected for peel away and the unscribed areas for blistering. Conformance to 3.
NOTE: The margins of the amendment are marked with an asterisk to indicate where changes from the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations.
Bidders and contractors are cautioned to evaluate the requirements of the document based on the entire content irrespective of the marginal notations and relationship to the last previous issue.
Aircraft and space vehicle engineering In the United States, only recently have standards begun to reflect non-hexavalent chrome options. IPC qppl translated into French. This public forum has qplthreads. If you see any color at all, it may appear as a tinge of brown. Petroleum and related technologies Regulatory Text to Final Rule. Chemical Conversion films on aluminum are applied by either the immersion in or spraying on a chemical mixture composed primarily of hexavalent chrome.
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