1. A method for reducing, mitigating or eliminating chemical corrosion during the gas phase application of chlorine dioxide within an enclosed volume, comprising the steps of:
a) climatizing the enclosed volume to a relative humidity (RH) in the range of about 5% to about 54%;
b) generating chlorine dioxide gas;
c) introducing the chlorine dioxide gas into the enclosed volume under specified conditions of chlorine dioxide gas concentration and contact time (CT conditions), wherein the RH and the CT conditions are effective to (i) eliminate contaminants within the enclosed volume and (ii) mitigate chemical corrosion caused by the oxidation of chlorine dioxide within the enclosed volume and on contents therein during the gas phase application, and wherein the CT value is about 29,000 ppmv-hrs to 1000 ppmv-hrs.
2. The method of claim 1 wherein said relative humidity (RH) is below a threshold level for substantially reducing or eliminating corrosion caused by the oxidation of chlorine dioxide within the enclosed volume and on contents therein.
3. The method of claim 1 wherein said relative humidity (RH) is in the range of about 35% to about 53%.
4. The method of claim 3 wherein said relative humidity (RH) is in the range of about 40% to about 52%.
5. The method of claim 4 wherein said relative humidity (RH) is in the range of about 45% to about 50%.
6. The method of claim 5 wherein said relative humidity (RH) is in the range of about 45% to about 48%.
7. The method of claim 1 further comprising the step of: creating a negative pressure in the enclosed volume.
8. The method of claim 7 wherein creating a negative pressure comprises reducing the pressure within the enclosed volume to less than the ambient pressure outside the enclosure by withdrawing from 50 to 100 CFM of air from the enclosed space.
9. The method of claim 1 further comprising the step of: distributing the introduced chlorine dioxide gas in the enclosed volume.
10. The method of claim 1 further comprising the step of: monitoring and controlling temperature, RH, concentration, and contact time within the enclosed volume.
11. The method of claim 1 wherein said contaminants within said enclosed volume are selected from the group consisting of: bacteria, spores, molds, mycotoxins, allergens, insects, larvae, arachnids, lizards, and combinations thereof.
12. The method of claim 1 wherein the enclosed volume is selected from the group comprising a large building, portions of a large building, a large structure and portions of a large structure, each of which require remediation.
13. The method of claim 12 wherein the enclosed volume includes contents requiring remediation selected from the group consisting of wallboard, wallpaper, structural components, carpeting, ceiling tiles, and combinations thereof.
14. The method of claim 12 wherein said enclosed volume and objects therein comprise objects selected from the group consisting of metallic objects, non-metallic objects, and combinations thereof.
15. The method of claim 14 wherein said metallic objects are formed from metals selected from the group consisting of steel, aluminum, iron, copper, chromium, lead, and combinations thereof.
16. The method of claim 15 wherein said non-metallic objects are formed from materials selected from the group consisting of wood, plastics, brick, stone, concrete, ceramic tile, ceiling tile, carpet, woven fabric, and combinations thereof.
17. The method of claim 12 wherein said enclosed volume comprises objects that are susceptible to corrosion when contacted by chlorine dioxide.
18. The method of claim 17 wherein said objects are selected from the group consisting of electronic equipment, telephone equipment, computers, copiers, office equipment, furnishings, and combinations thereof.
19. The method of claim 1 wherein said introducing the chlorine dioxide gas comprises: introducing chlorine dioxide gas into the enclosed volume at a concentration of about 25 ppmv to about 10,000 ppmv.
20. The method of claim 19 wherein said chlorine dioxide gas is at a concentration of about 500 ppmv to about 3,000 ppmv.
21. The method of claim 1 wherein said climatizing the enclosed volume is carried out at a temperature of about 10\xb0 C. (50\xb0 F.) to about 32\xb0 C. (90\xb0 F.).
22. The method of claim 21 wherein said climatizing the enclosed volume is carried out at a temperature of about 18\xb0 C. (65\xb0 F.) to about 29\xb0 C. (85\xb0 F.).
23. The method of claim 1 wherein the step of generating chlorine dioxide gas is effected by generating chlorine dioxide gas from aqueous chlorine dioxide, wherein said aqueous chlorine dioxide is generated by reacting hydrochloric acid, sodium hypochlorite and sodium chlorite.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A base member having a relatively large thickness to which an attachment member is attached, the attachment member being composed of a relatively thin sheet member which has a cylindrical boss section projecting from a surface of the sheet member and which has a path passing through the sheet member and reaching the extreme end of the boss section, the base member comprising:
a through hole which passes therethrough in the thickness direction thereof and into which the boss section is inserted,
wherein the attachment member is caulked to the base member by plastically deforming the boss section by causing a spherical body whose diameter is larger than that of the path to pass through the path in the state that the boss section is inserted into the through hole;
the through hole has an escape section into which a part of the boss section, which is plastically deformed when the attachment member is caulked to the base member, escapes in the radial direction of the path; and
the through hole and the escape section form an opening whose circumference is closed, and the opening is longer in a longitudinal direction of the base.
2. A base member according to claim 1, wherein the through hole is a hole having such a shape that a large circle whose diameter corresponds to the outside diameter of the boss section overlaps a small circle whose diameter is smaller than that of the large circle so that the arc of the large circle intersects the arc of the small circle, and the portion of the small circle which is located outside of the large circle acts as an escape section.
3. A base member according to claim 1, wherein the through hole is an elliptic through hole, and both the ends of the elliptic through hole in the major axis direction thereof act as escape sections.
4. A base member according to claim 1, wherein:
the base member is a carriage arm whose extreme end turns along a surface of a predetermined information storage medium using the rear end thereof as a fulcrum by receiving a drive force from an actuator; and
the attachment member is a spacer to one end of which the rear end of a suspension arm is attached in the lengthwise direction of the spacer and the other end of the spacer is attached to the extreme end of the carriage arm, the suspension arm having a magnetic head disposed at the extreme end thereof to execute at least any one of recording and reproducing of information to and from the predetermined information storage medium.
5. A base member according to claim 4, wherein the through hole has a projecting space projecting from the circle whose diameter corresponds to the outside diameter of the boss section toward the extreme end of the carriage arm, and the projecting space acts as the escape section.
6. A base member according to claim 5, wherein the through hole is an elliptic through hole whose major axis direction is in agreement with the lengthwise direction of the spacer attached to the carriage arm, and both the sides of the elliptic through hole in the major axis direction thereof act as the escape sections.
7. An information storage apparatus comprising:
a magnetic head that executes at least any one of recording and reproducing of information to and from a predetermined information storage medium;
a suspension arm that holds the magnetic head such that the magnetic head approaches or comes into contact with the information storage medium;
a carriage arm that moves along a surface of the information storage medium by receiving a drive force from an actuator; and
a spacer whose one end is attached to the suspension arm as well as the other end thereof is attached to the carriage arm, the spacer having a cylindrical boss section projecting from a surface of a sheet member whose thickness is smaller than that of the carriage arm and having a path passing through the sheet member and reaching the extreme end of the boss section,
wherein the carriage arm has a through hole which passes therethrough in the thickness direction thereof and into which the boss section is inserted;
when the spacer is attached to the carriage arm, the spacer is caulked to the carriage arm by plastically deforming the boss section by causing a spherical body whose diameter is larger than that of the path to pass through the path in the state that the boss section is inserted into the through hole;
the through hole has an escape section into which a part of the plastically deformed boss section escapes in the radial direction of the path when the spacer is caulked to the carriage arm; and
the through hole and the escape section form an opening whose circumference is closed, and the opening is longer in a longitudinal direction of the base.