ASNT Level III- Visual & Optical Testing

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7.3.5 Chemical Purity Chemicals are available in various grades of purity ranging from technical to very pure reagent grades. For etchants, the technical grade is used unless a purer grade is specified. For macroetchants, the technical grade is generally adequate. Water is the solvent used for most macroetching solutions and water purity can affect the etchant. Potable tap water may contain some impurities that could affect the etchant. Distilled water has a significantly higher purity than tap water. For macroetchants using technical grade chemicals, potable tap water is usually acceptable. For etchants in which high purity is required, distilled water is recommended. Charlie Chong/ Fion Zhang
7.3.6 Disposal Before disposing of chemical solutions, check environmental regulations (federal, state and local) and safety department procedures. The steps listed here are used only if there are no other regulations for disposal. Spent etchants are discarded and must be discarded separately—mixing of etchant materials can produce violent chemical reactions. Using a chemical resistant drain under an exhaust hood, slowly pour the spent etchant while running a heavy flow of tap water down the drain. The drain is flushed with a large volume of water. Charlie Chong/ Fion Zhang
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ASNT Level III- Visual & Optical Te
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At works Charlie Chong/ Fion Zhang
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Charlie Chong/ Fion Zhang Fion Zhan
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SECTION 4: BASIC AIDS AND ACCESSORI
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PART 4: MACHINE VISION TECHNOLOGY 4
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PART 6: TEMPERATURE INDICATING MATE
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PART 4: MACHINE VISION TECHNOLOGY 1
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5.1 Cellulose Acetate Replication A
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5.1.2 Fracture Surface Analysis The
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Replicas, in the as-stripped condit
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Microstructural replication is done
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If analysis with the scanning elect
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Sputter deposition is a physical va
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Sputtering http://en.wikipedia.org/
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Sputtering http://clearmetalsinc.co
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Sputter Deposition Charlie Chong/ F
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5.1.4 Strain Replication The replic
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FIGURE 56. Principles of acetate ta
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Fatigue striations Charlie Chong/ F
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FIGURE 59. Documentation of creep d
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FIGURE 60. Documentation of stress
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TABLE 14. Action required for creep
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Cellulose Acetate Replication http:
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Replication Microscopy Techniques f
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Replication Microscopy Techniques f
Page 51 and 52: 5.2.1 Use of Silicone Replicating M
Page 53 and 54: FIGURE 63. Silicon replicas used to
Page 55 and 56: Brittle Failure Chevron Marking Cha
Page 57 and 58: PART 6: TEMPERATURE INDICATING MATE
Page 59 and 60: Temperature indicating sticks were
Page 61 and 62: Levels of Charlie Chong/ Fion Zhang
Page 63 and 64: 6.2 Certification of Temperature In
Page 65 and 66: 6.3 Applications for Temperature In
Page 67 and 68: 6.3.2 Verifying Oven Temperatures T
Page 69 and 70: 6.3.4 Process Control Applications
Page 71 and 72: 6.3.6 Precise Post forming Heat Con
Page 73 and 74: Another example of handforrning is
Page 75 and 76: 6.3.7 Pipeline Coatings Epoxy powde
Page 77 and 78: The most common use for temperature
Page 79 and 80: FIGURE 67. Temperature indicating s
Page 81 and 82: PART 7: CHEMICAL AIDS 7.0 General T
Page 83 and 84: 7.1 Test Object Selection Figure 68
Page 85 and 86: 7.2 Surface Preparation Preparation
Page 87 and 88: 7.2.2 Removing Rust and Scale Rust
Page 89 and 90: If the required finish cannot be ac
Page 91 and 92: FIGURE 70. Example of contrast reve
Page 93 and 94: 7.3.2 Safety Precautions Etchants a
Page 95 and 96: Etchant Safety Charlie Chong/ Fion
Page 97 and 98: Etchant Safety Charlie Chong/ Fion
Page 99 and 100: 7.3.3 Containers Containers used wi
Page 101: 1. add the acid or alkali to the wa
Page 105 and 106: 7.4.2 Swabbing Etching may also be
Page 107 and 108: 7.4.4 Test Object Preservation Rins
Page 109 and 110: 7.5 Conclusion Visual testing is pe
Page 111 and 112: Cellulose Replica Sheets Charlie Ch
Page 113: Charlie Chong/ Fion Zhang
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