Potassium sulfate chemical analysis

Page Title: Potassium sulfate chemical analysis
Back | Up | Next

Web
www.tpub.com

Information Categories

....

MIL-R-48233A(MI)

4.3.3 Testing

4.3.3.1 Potassium sulfate chemical analysis (see para. 3.7.2 -

Major Defect). A chemical analysis to determine the total potassium

sulfate content in the stabilizing rod coating material shall be

performed on two (2) samples per lot of coating material in accord-

ance with paragraph 4.4.1, using equipment in accordance with para-

graph 4.3.4. All material since the last acceptable sample shall

be rejected if the calculated percentage of potassium sulfate on

either of the two aliquot samples is less than 65% or greater than

72% by weight.

4.3.3.2 Thermal shock test (see para. 3.7.3 - Major Defect) . A

thermal shock test shall be performed on 25 samples per lot to

determine the coating materials resistance to degradation. The

test shall be performed in accordance with para. 4.4.2, using

equipment in accordance with para. 4.3.4. Any evidence of loosening,

cracking or chipping shall be cause for lot rejection.

4.3.3.3 Concentricity test (see para. 3.7.4 - Major Defects) . A

concentricity test shall be performed on ten (10) samples which

have successfully passed the requirements of the thermal shock test

(See para. 4.3.3.2). The test shall be performed in accordance with

para. 4.4.3, using equipment in accordance with para. 4.3.4. The

lot shall be rejected if the concentricity of one or more stabilizing

rods is greater than that specified on the applicable assembly drawing

Remaining samples are to be discarded.

4.3.3.4 Adhesion test (see para. 3.7.5 - Major Defect) . An adhesion

test shall be performed on ten (10) coated rods which have success-

fully passed the thermal shock test (See para 4.3.3.2) . This test,

to determine bond strength between the coating--and the rod, shall

be performed in accordance with para. 4.4.4, using equipment in

accordance with para. 4.3.4. The lot shall be rejected if the

average of the recorded maximum load of the three sample sections

from any rod fails to meet the sixty (60) pound minimum requirements.

Remaining samples are to be discarded.

4.3.3.5 Platinq adequacy test.- A plating adequacy test shall be

required for cadmium coatings (See MIL-STD-171, para. 1.1.1.2)

and for zinc coatings (See MIL-STD-171, para. 1.9.1.2) .

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business